Compressed mp3 files. Still good quality but taking the edge off some of the excessive filesizes. About a 40% space saving.
Fixed a few StyleCop violations.
Changed WinFormSpriteInterface to support manual drawing of images to a native GDI bitmap for the window. That is noticeably faster than the GDI+ method. However the project must now be compiled in unsafe mode as the alpha blending method must interact with the unmanaged pointer directly for speed.

Removed alpha-blending as an option - it is now the default. This allows the removal of the fallback drawing code from WinFormSpriteInterface simplifying it a lot.
Renamed BitmapColors to BitmapExtensions and added checks in methods to verify the pixel format can be worked on.
Added some missing xmldoc.
Cached a few more delegates in Pony and Behavior to prevent repeated allocations.

Added LinqSpecialized.Any for lists since Pony.UpdateOnce now calls this every time to check for valid behaviors.
Added support for drawing 4bbp indexed images in WinFormSpriteInterface. This allows the memory usage of the process to reduced noticeably as many images have small enough color palettes to fit this format, and this halves the memory required for these images.
Version to 1.42.4.

Fix GtkSpriteInterface not reporting focus.