Recompressed images.

Loading of images in menu in now done asynchronously to improve initial load times a bit.
Added updated Changling by Bot-chan

Added Princess Twilight Sparkle by Bot-chan
Fixed Spitfire/Trixie config files to allow switching between their behavior groups (suggested by Anon)
Fixed minor derp preventing sound from playing.
Fixed pony/ponybase that owns an effect so editor didn't break when setting an interaction target.
Changed random speeches to play for group 0 or current group (as with behaviors).
Fixed standard paint to use override when an interaction is following someone and appropriate override behaviors are available. Hopefully should be the final fix for ponies not entering idle animations during interactions.
Ran some analysis provided by VS 2012:

Sped up hashing function of GifImage and Seek function of DataBuffer which has reduced image load times somewhat.
Fixed WinFormSpriteInterface image loading to only pre-multiply alpha channels if needed, saving wasted memory allocations materializing the color palette in managed memory, only to not change it.