2018-06-01:
Version 1.0.0.
- Migrated to Python 3.
- Now uses openpyxl instead of pyExcelerator, and saves output to .xlsx files
  rather than Excel 2003 .xls files.
- Particles outside the simulation window can now be chosen to be excluded for
  interpoint distance calculations when using Monte Carlo simulations with
  simulation window other than 'Profile + shell' and provided simulated
  interpoint distances are also calculated. This allows for better comparison
  between interparticle distances and simulated interpoint distances.
- Processed coordinates, including Monte Carlo simulated points and convex
  hulls of particle clusters can now be saved to new output files for each 
  profile. These coordinates can be plotted using PlotProfile.py.
- Removed option to choose which summary files to save.    
- Adjusted the list of possible combinations of point types for which 
  interpoint distances can be calculated.
- Increased the number of decimals (i.e., accuracy) used for pixel width in 
  coordinate files saved by the ImageJ plugin to 4.
- Changed icon.
- Other minor changes.

2015-04-21:
- Version 1.0pre3.
- Bug fixes and code cleanup.

2014-11-11:
- Version 1.0pre2.
- The ImageJ plugin now uses image overlays when defining profile components. 
  This means that the components can be easily modified or deleted after 
  creation. When the profile is saved, the components are burnt into the 
  analyzed image and can no longer be changed. 
- Code cleanup and miscellaneous changes and bug fixes in both the Python 
  component and the ImageJ plugin.
- License changed to the MIT license.

2014-05-14:
- Version 1.0pre1.
- Modified the user interface of the Python component; it should now work
  properly also on platforms other than Windows.
- Now saves current input directory to a config file named 
  '.particledensitydouble.cfg' in the user's home directory.
- Current options can also be saved to the config file. Options specified in 
  that file will be loaded when the program is started.
- Fixed a bug, introduced in the previous version, that caused the Windows 
  binary version of the Python component to not be able to write Excel files.
- Other small bug fixes and changes.

2014-04-23:
- Adjusted some elements in the user interface so they are not partly 
  hidden when using newer versions of wxPython.
- Added link to new web site in the About dialog.

2013-11-15:
- Fixed a bug that prevented random regions of interest (ROIs) 
  generated by Place random ROI to be used to define profile border 
  (or hole).
- Rectangular ROIs in general may now be used to define profile 
  borders or holes.

2013-11-13:
- Fixed a bug in the Python component that produced a parsing error
  for input files not containing random points.
- Minor bug fixes.

2010-12-15:
- Rewrote and cleaned up some code.
- A few minor changes and bug fixes.

2010-02-15: 
- First public version released.