Changes in v4.2
* Added palette generation from Windows Bitmap pixel data.
* Added 16-bit and 32-bit Windows Bitmap file loading to the Use Palette tab.
* Added red, green and blue value-based color sorting.
* Reinstated the use of the right mouse button to make range selections.
* Added Unix line ending support to PSP file loading.
* PSP files are now saved with their actual sizes, not just 16 or 256.

Changes in v4.1
* Added HSI color made.
* Fixed HSL & HSV bug affecting certain hues.
* Made undo/redo behavior in the Edit Values tab more consistent.
* Made the paste, clear, fill and gradient functions in the Apply Effects tab
  respect the color channel filters.
* Added CSV file support.
* Further interface tweaks.

Changes in v4.0 since v3.02
* Updated interface.
* In the Apply Effects tab, range selection is now another left mouse button
  selection mode instead of the only right mouse button selection mode.
* All selection modes can be accessed using the shift and control keys.
* The image that's to be processed can be pasted from the clipboard.
* The processed image view now updates with changes to the palette.
* The multiplicative brightness effect has been reinstated.
* The effect of setting the threshold for the negative effect has changed.
* There's now a gamma-adjusted gradient function ("Bright gradient").
* Expanded mouse wheel usage.
* The RGB+1 color mode has been removed.
* More options for creating new palettes, including monochrome and dichrome
  palettes using the "New RGB palette..." menu option.
* Reorganized menus.
* Application settings are now user-specific.
* And more!
