Improved image data xml parsing to allow for spritesheet parsing.
Added additional parsing attributes (sliced (b), width (f), offsetX/Y/DispX/DispY (f)).
Began to implement NPC loading, more to follow at a later date.
Added ImageContainer class for ease of handling Image arrays and spritesheets simultaniously.
Added AnimationContainer class for ease of handling Image node parsing.
Added default AI state as idle.
Other minor changes.
Merge branch 'master' of https://github.com/ICMediaLab/HelloGame