Create individual avatar files, for 16 avatars.

NPC files are also there, but unused for now, just
ganked from the sprite sheets.
Merge pull request #1 from captdeaf/master

Create individual avatar files, for 16 avatars.
Fix transparency for avatar and npc backgrounds
Merge pull request #2 from captdeaf/master

Fix transparency for avatar and npc backgrounds
Animate avatar (only one state)

The code to change avatar is not yet complete, but avatar is now
animating.
Merge pull request #50 from alanjcfs/choose-and-animate-avatar

Choose and animate avatar