#### 1.9.6 - 2011 (Revision 1295)
NEW FEATURES
IMPROVEMENTS
   * More efficient Le Bail extraction
   * Nicer color display of crystalline phases in powder graph
   * Auto-download wxGTK and fftw for linux compilation
BUG FIXES
   * Update cctbx & boost for compilation with gcc >=4.6

#### 1.9.5 - March 2010 (Revision 1274)
NEW FEATURES
   * Add Fox.Grid extension allowing distributed computing
   for Fox, with a server and a client graphical interface.
   It also allows distributing computation on all the cores
   of a single computer. (J. Rohlicek, M Husak)
IMPROVEMENTS
   * More accurate Bayesian estimation of background
   * Use a better evaluation of peak positions for indexing
   * Better CIF import
BUG FIXES
   * Prevent running Le Bail/profile fitting in the absence of
   a crystalline phase
   * Fix rare infinite loop when scaling ill-conditionned multiphase
   powder patterns

#### 1.9.0.2 - January 2010 (Revision #1215)
BUG FIXES
   * Fix display of imported (e.g. .grd) Fourier maps

#### 1.9.0.1 - November 2009 (Revision #1204)
NEW FEATURES
   * Add automatic least-squares refinement of the structure during
   a global optimization run
   * Take into account rigid groups during least-squares refinement
   * Working triclinic indexing
   * Allow manual adding of peaks for indexing without a peak search
   * Add manual least-squares refinement of the structure in the 
   global optimization run/stop menu
   * Better import of CIF files, using either the Hall symbol
   or the symmetry_equiv_pos_as_xyz fields to avoid 
   ambiguous space group
   * Enable auto-generation of powder patterns from a CIF file
   for both X-ray and neutron radiation
   * When importing powder pattern CIF files, recognize both
   _pd_proc_2theta_range_XXX and _pd_meas_2theta_range_XXX

BUG FIXES
   * Avoid deadlock (freezing fox) when using the 3D crystal view or
   the powder pattern graph
   * Correct molecule rotation quaternion when using least squares
   * Correct log(likelihood) calculation using integrated intensities
   (could cause invalid Chi^2 values when used without gui)
   * Correct Fullprof export when 3 or more independent atoms are
   overlapping
   * Work around visual c++ compilation bug during Fullprof export,
   that would output U U U instead of U V  W parameters
   * Updated cctbx (and boost) version - fixes compilation with gcc 4.4
   * Enable importing Fenske-Hall zmatrices file both for human-written
   files (with whitespace between fields), and for strictly formatted
   files (sometimes without any space between fields)
   * Avoid giving up when encountering parameters with the same name,
   notably for least squares refinements

#### 1.8.1.2 - April 2009 (Revision #1117)
BUG FIXES
   * Fix auto-scrolling bug with wxWidgets >=2.8.8
   * Better formatting of some fields (overall cost,...)

#### 1.8.1 - March 2009 (Revision #1113)
NEW FEATURES
   * Add an option to use molecular dynamics random moves
   when generating new molecule conformations, for molecules
   with severe restraints (e.g. macro-cycles)
   * Add a menu to test random moves of a crystal structure for 30s

BUG FIXES
   * Correct calculation speed for powder patterns when using
   integrated profiles
   * Correct display of colours in 3D view for Mac OSX
   * Correct import of gsas raw format
   * Faster read of uncompressed xml files under windows
   * Many fixes for the Linux unicode build of Fox
   
#### 1.8.0.3 - February 2009 (Revision #1088)
BUG FIXES
   * Fixed reading, writing files and display of labels in the
   linux unicode version of Fox

#### 1.8.0 - January 2009 (Revision #1080)
NEW FEATURES
   * Add a "spacegroup explorer" feature to the profile fitting
     widget, trying all spacegroups compatible with the unit cell,
     and calculating the corresponding Rwp and GoP.
   * Manual selection of profile parameters is now possible during
     profile fitting.
   * Add powder pattern -> Fullprof export (creates .pcr and .dat)
   * Add the ability to convert a list of atoms to a Molecule.
   * Mac version is now provided as a universal binary

IMPROVEMENTS
   * More optimized integration intervals for powder pattern
   * Allow choosing the number of peaks used for manual indexing
   * Avoid identical triclinic unit cells
   * Fox can now more easily be compiled with shared libraries for
     wxWidgets, fftw, (free)glut and newmat
   * Enable compilation with the unicode version of wxWidgets

BUG FIXES
   * Correctly handle change of Crystal for powder patterns,
     regenerate HKL list.
   * Correctlky handle change of spacegroups during profile fitting

#### 1.7.7 - June 2008 (Revision #1013)
NEW FEATURES
   * Import single crystal data from CIF
   * Use M(n) for indexing scores, with n=20 as default

IMPROVEMENTS
   * Faster Le Bail
   * Improved triclinic indexing

BUG FIXES
   * Correct Fourier maps listing, when the 3D crystal view is
     opened during the Le Bail extraction
   * Fix freezing of optimization during long runs on windows.
   * Handle cas when scale factors or intensities would be written
     as NaN in xml files.
   * Correctly add/remove Fourier maps

#### 1.7.6.2 - April 2008 (Revision #995)
NEW FEATURES
   * Support Fourier maps for single crystal data
   * Display Fourier maps with the original resolution used for the
     extraction, no matter what resolution is used afterwards
     (e.g. during the optimisation)

IMPROVEMENTS
   * More efficient random moves for molecules, particularly for
     large molecules or with flexible cycles.
   * Better automatic changes of temperature for parallel tempering
   * Linux: enable compilation using "make -jN" (j2, j4...)
   * Nicer atom drawing. Force double buffering

BUG FIXES
   * Fixed incorrect formula for sample displacement
   * Linux: avoid lock of optimisation when 3D view is opened
   * Correct monoclinic indexing
   * Fix issue with manual auto-indexing
   * Disable auto-check for updates (could crash under Linux when no
     network can be reached)

#### 1.7.5 - February 2008 (Revision #956)
NEW FEATURES
   * Add support to compute Fourier maps (observed, difference),
     with a "live" update during optimization
   * Profile fitting and Le Bail extraction is now directly 
     available from a right-click on the powder pattern graph.
   * Support for Intel macs
   * Indexing triclinic lattices
   * Explore centered lattices during auto-indexing
   * LeBail-extracted structure factors are now saved in the xml file

IMPROVEMENTS
   * More stable profile fitting
   * Linux: keyboard shortcuts are working again
   * Correctly compute reflections beyond the supplied 
     max(sin(theta)/lambda), but whose profile extend below the limit.

BUG FIXES
   * Fixed incorrect computation of dynamical occupancy correction
     in some asymmetric unit configurations
   * Fixed crash when switching labels on/off during optimization
   * Fixed windows crash when removing atoms in a Molecule/Polyhedron

#### 1.7.1 - December 2007 (Revision #903)
NEW FEATURES
   * Add peak detection & auto-indexing (still beta for some values)
   * Add Le Bail fitting
   * Add graph representing Iobs and Icalc as a function of 1/d 
     for single crystal data.
   * Add user-controlled rotation of atoms around any existing bond

IMPROVEMENTS
   * Better support for CIF files import
   * More responsive UI (refresh display even when no new solution 
   has been found, every 30s at least, and no more than once every second)
   * Always report *real* time instead of process-time for the
   first 100s, and then real time

BUG FIXES
   * Correct distance table calculations in some cases, and therefore
   dynamical occupancy correction...

#### 1.7.0 - February 2007
NEW FEATURES
   * Support for multiple optimizations - store all the solutions 
     obtained, then allow 'browsing' the solutions.
   * Support for neutron time-of-flight data
   * Support for reflection profiles other than symmetrical pseudo-Voigt
   * Add bond-valence computation
   * CIF import (powder patterns / crystal structures)
   * Background can be automaticaly estimated using a Bayesian
     approach (David-Sivia method)
   * Background calculation can now use either a linear or a cubic
     spline interpolation
   * Support for Mac OS X (using XCode /Apple Developper tools)
   * Add a 'tracker' window to display the progress of the optimization,
     including all the Chi^2, antibump costs, ...
   * Add preferences (remembered between sessions) to automatically open 
     crystal 3D view, powder pattern graph, display names / reflections 
     Miller indices,...
   * Enable saving files in a compressed (gzip) format (*.xml.gz)
   * Add graph display for Single Crystal data (Iobs and Icalc vs 1/d)

IMPROVEMENTS
   * Add choices for scaling of powder pattern graphs: x as 2theta/tof,
     1/d or 2pi/d ; y as I, sqrt(I) or log10(I)
   * Compilation for windows is now done using the free (as in 'free as
     a beer') compiler Visual C++ 2005. Large speed improvement.
   * Fox can be compiled without GUI under *nix, using "make Fox-nogui"
     removing the requirement for wxGTK on *nix servers.
   * Support for large Molecules (1000's of atoms) - these *must* be 
     treated as rigid bodies
   * Better graphical interface to a Molecule's parameters, including
     rigid sub-groups
   * Better graphical interface to access scattering power parameters
     (Biso, antibump, bond valence, colour...)
   * Significant speed improvements for powder patterns when using
     the default integrated Chi^2
   * Rotation amplitudes for torsion angles and overall molecule
     rotation is now tuned so that the average displacament per atom
     is now set to 0.1 Angstroem.
   * Faster refresh of graphical user interface
   * Using cctbx rather than atominfo + sglite, enabling using either
     Hall, Hermann-Mauguin or spacegroup number for spacegroup 
     description. Fox will revert to the Hermann-Mauguin symbol.
   * freeglut and wxWidgets are statically linked under Linux as well
     to avoid compilation issues for user without root access.

BUG FIXES
   * Avoid creating H-H bonds when converting ZScatterer to a Molecule
   
#### 1.6.0.2 - december 2003
NEW FEATURES
   * Added the export to a POV-Ray file to create a Ray-traced
     view of the 3D Crystal window, with support for both Crystal
     structure and Fourier maps.
   * Added more user control on the fexibility of a Molecule:
      - Added "Rigid Body" and "User-Chosen Free Torsion" choices
        for the flexibility model of the Molecule.
      - Also added an option to disable the optimisation of the
        orientation of the Molecule (only useful for "Rigid Body" mode)
      - Give access to the delta and sigma parameters to calculate
        restraints, although users are HIGHLY advised not to change
        the default values unless they really know what they are doing
      Also, a Molecule will by default be less flexible than before
   * Added import of DSN6 Fourier maps, which can be created by
     forplot in GSAS.
   * Reverted to using GLUT under Linux to display atom labels in
     the OpenGL window, as some graphical drivers did not fare well
     with the new method.
   * Ability to remove several atoms/bonds/angles at the same time.
     When removing a bond, offer to remove the bond angles and
     dihedral angles using that bond.
   * Added reflection labels on the powder pattern graphical display.
   * Speed improvements by avoiding (more) recomputations.
   * Fox now uses wxWindows 2.4.x (no support for versions <2.4).
   * Added support for Cobalt X-Ray tube. Also, correctly save
     X-Ray tube parameters when they have been entered manually.
   * Fourier maps with negative contour values will now be highlighted
     towards negative values, for Fobs-Fcalc maps display.
   
BUG FIXES
   * The position of peaks on a powder pattern was randomly displaced
     by up to +/-2 pixels for each reflection. This could be serious
     for patterns recorded with a low resolution relatively to the
     peak widths, although the use of "integrated" Chi^2 and R-factors
     reduced the gravity of this bug. (thanks Michal Husak for
     serious testing and reporting)
   * In the CIF output, some atoms were wrongly labeled as being 
     overlapping with another identical element.
   * In the graphical display of powder patterns, improve the precison
     of the display.
   * Correct center of view coordinates when the center of the displayed
     structure is not at (0.5,0.5,0.5)


#### 1.5 - june 2003
NEW FEATURES-MAJOR CHANGES
   * The optimization will now use log(likelihood) as a criterion:
     in practice, this means that the Chi^2 statistics are used
     rather than the user-chosen cost functions. The likelihood
     can sometimes be parametrized in the objects (crystal, pattern),
     but not any more in the Global Optimization objects.
   * Added a Molecule class, which suprsedes the ZScatterer approach
     The scatterer is defined by a list of atoms, and restraints
     (bond lengths, angles and dihedral angles) to specify the
     geometry. This gives more flexibility, allows a better 
     convergence and allows to correctly define cyclic molecules.
   * Added the ability to define a statistical positionnal error
     for atoms, which will be taken into account following Maximum
     Likelihood principles (ML field in ScatteringPowers), of course
     with a significant amount of approximations to be computationnaly
     friendly.
   * CIF output (with the help of Brian Toby).

OTHER NEW FEATURES
   * Faster computation when using integrated profiles for powder
     pattern objects
   * Error bars are now displayed on the Powder Pattern graphical 
     display.
   * Further improvements of the Fourier maps display (mostly from
     Brian Toby)
   * A cursor can be displayed in the center of the 3D Crystal view,
     its coordinates are displayed at the bottom of the window, with
     the value of Fourier maps (if any)
   * Added atom labels in 3D Crystal view (right-click menu to
     deactivate)
   * In OpenGL view of a Crystal structure, shift-dragging with left
     mouse button now correctly changes the center of the view without
     changing the rotation center.
   * Changed lighting model in 3D Crystal view
   * Added the ability to save structure factors from a
     DiffractionSingleCrystal object, including detailed contributions
     from different elements (useful for anomalous diffraction
     experiments)
     
BUG FIXES
   * Fixed bug when exporting to a Fenske-Hall z-matrix, the 4th atom
     was always repeated twice
   * Overall ZScatterer occupancy is now correctly taken into account.
   * Auto-save of xml files will now use local time rather than gmt.


#### 1.3 - december 2002
NEW FEATURES
   * Added a contribution from Michael Y. Polyakov, (working with
     Brian Toby) to display Fourier maps exported from GSAS in 
     Fox (use right-click when displaying 3D structure to import).
   * Added scattering power for a sphere, e.g. to modelize a
     disordered fullerene.
   * Added the option to use pseudo-crystallographic symmetry in a
     Crystal structure (i.e. use a spacegroup which is not allowed
     by the unit cell). Could be useful for phase transitions.
   * Added data format for FullProf formats 4 (synchrotron) and 
     6 (multi-detector, LLB G42)
   * Now more than 100 atoms can be displayed in a ZScatterer unit.
   * Added the ability to set relative limits on all scatterer
     translations from their current positions.
   * Added the ability to run Fox without the graphical interface,
     once all objects to be optimized have been setup and saved in
     a xml file.
   * shift-dragging with left mouse button allows to change center of
     the 3D Crystal view.
   
BUG FIXES
   * Fix serious bug in the dtermination of systematic extinctions,
     which lead to missing reflections for (body|face)-centered
     spacegroups with a center of symmetry not on the origin
     (e.g. for Fd3m (Si,...))
   * Fixed various bugs in the display and update of powder patterns
   
#### 1.2 - august 2002
NEW FEATURES
   * FOX now supports Preferred Orientation, using the March-Dollase
     model. The texture parameters can be searched ab initio.
   * The 3D display of the crystal structure is now also refreshed
     automatically under WinNT and above (still much less responsive
     than under Linux -hint,hint).
   * The default size of crystal structure and powder pattern are more
     reasonable under windows.
   * New atoms in ZScatterer are now given a sensible default name,
     ScattPowName+number of the atom.
   * The wavelength is now directly displayed in the window, rather
     than exclusively through a menu.
   * Added ability to duplicate scatterers in Crystal.
   * Powder diffraction pattern keeps zoomed during optimization.
     
BUG FIXES
   * The atom names in ZScatterer are now validated without the
     'enter' key being hit.
   * Adding atoms in a z-matrix scatterer does not crash anymore.
   * removing a scatterer (or any object...) after running an 
     optimisation, does not crash any more when optimization is 
     relaunched (the parameter list is now correctly rebuilt).
   * Now correctly zooming when the dragged area goes beyond 
     2theta limits.
     
#### 1.1.2 - 2002/02/18
License changed to the GNU General Public License.
NEW FEATURES
   * Added a maximum value of sin(theta)/lambda for diffraction
     data objects. All data above is ignored.
   * Added an *experimental* option in single crystal data for
     twinned data, to work on the sum of metrically-equivalent
     reflections. Entirely untested (contact me to use it !)
	* Some parameter are automatically fixed for global optimizations
	  (unit cell, background & profile parameters).
   * Fox will write a few messages for some key events
     (importing data, creating spacegroup,...)

BUG FIXES
   * The dynamical occupancy correction now begins for interatomic
     distances below 1A, and proceeds to full correction for .1A
     (before that 2 and .8A where used (why?))
   * Spacegroup and Unit Cell values can now be changed even if
     scattering data has already been computed, without crash.
   * Importing a Z-Matrix would give the 3rd and 4th atoms the same
	  number, and if atoms were of the same type, both atoms would
	  have the same name in the .xml saved file, and would crash
     on reloading. Molecules thus created need to be re-imported.
	  
#### 1.1.1 - 2002/01/17
BUG FIXES
   * Under windows, the global optimization lead to a crash after
     some random time.
   * Under windows, clicking on some part of a powder pattern graph 
     would make Fox crash

#### 1.1 - 2002/01/8
NEW FEATURES
   * Now it is possible to import Z-matrices to build a molecule 
     structure (eg a Z-matrix file can be generated from a .pdb file
     using babel, and then imported into Fox)
   * Added integrated R and RW factors as new cost functions (thus
     less sensitive to badly defined profiles). Unless you have *very*
     good profile parameters, I recommend using the integrated Rw as
     a cost function.
   * Now it is recommended to choose an "exponential" schedule for
     the amplitude, from 8 to .125, and a "smart" schedule for the
     temperature. This should be optimized for *all* experiments,
     so that users don't have to guess the right choices.
   * It is no longer necessary to validate all input by hitting the
     'return' key (which was *very* annoying)
   * Ability to zoom on the powder pattern graph, using the left button
     (double-click to unzoom)
   * Possibility to reduce the part of the displayed unit cell in 3D 
     view (use the popup menu with right-click)
   * Significant speed improvement.
   * The Parallel Tempering algorithm has been tuned to yield a higher
     success ratio.
   * Possibility to used single-crystal data (eg extracted intensities)
     for crystal structure optimization (honest crystallographer's note:
     if you have high quality extracted intensities, try direct methods
     first...)
   * Added interface for 2theta zero/displacement/transparency
     parameters in a Powder Pattern object
   * Added an overall temperature factor (Biso) for each crystalline 
     phase in powder diffraction (also available in single crystal).
   * new examples for organic molecules (potassium tartrate and 
     cimetidine with powder & extracted pseud-single crystal
     intensities)
   * The program now forbids to check lattice or profile parameters
     for a global optimization.

-LINUX:
   * Now using a distribution from source using the wxWindows RPM, which
   * should make things easier under Linux.

-BUG FIX:
   * under linux, the antibump cost function was not properly restored
	  from an xml file (preventing merging of identical atoms)
	* Changing the spacegroup (and thus extinction rules) will now
	  will re-generate the list of reflections for powder diffraction.
	  Same if the lattice parameters or the wavelength has changed.
   * a number of minor bugfixes...

#### 1.0.1 - 2001/10/15
-BUG FIX: 
   * corrected minimum FWHM for profiles from .001 to .00001 radians

#### 1.0 - 2001/10/15
-NEW FEATURES
   * support for multiple crystalline phases in Powder Diffraction (you
      can refine several phases from one pattern ...provided you can 
      index them)
   * the Windows version now displays a console to give a better idea
     about what the program is doing.
   * Import of Sietronics data files (.cpi)
   * Linux binary version also available for glibc 2.1
   
-BUG FIXES:
   * removed another bug in ZMatrix interpretation, which prevented the  
     correct coordinates to be generated when using mono/triclinic unit
     cells (thanks Mark Edgar).
   * the program will no longer crash when importing data with null or 
     negative points.
   * U,V and W parameters leading to negative profile width will no
     longer crash the program (profile forced to be strictly positive)
   * various cosmetic bugs
   
#### 0.9.1 Beta - 2001/09/20
-NEW FEATURES
   * Added menus to change limits globally in a ZScatterer(bond,angles)
   * Now the pivot atom (around which the ZScatterer is rotated, and
     which corresponds to the displayed x,y,z position of the 
     ZScatterer) is saved in the .xml file. It can also be changed 
     from a menu.
   * Limits can be changed individually for all parameters, using a 
     popu menu: right-click on the parameter name to get the local menu

-BUG FIXES:
   * removed a nasty bug in ZMatrix interpretation, which prevented  
     the correct coordinates to be generated  for chains longer than 3 
     atoms. Did not affect polyhedras... (thanks Yuri Andreev)

#### 0.9   Beta - 2001/09/18
   Initial Public release
   
#### 0.5-0.9
   Internal release only... Thanks to Laure Guenee, 
   Guillaume Renaudin and Radovan Cerny for testing !
