Stances, ArtAnimation package

Added fast and balance stances to code
- switch via 1 and 2 keys

Changed blending from 0.25s to 0.15s

added console commands:
LightStance
BalanceStance
Heavy Stance (not working, might cause crash, becareful)

Added comments to ArtAnimation package for easier understanding (in
animtree)

Added hooks to 1, 2, and 3 in DefaultInput.ini