Rename ObjectList to ObjectScene. Wrap it in a SharedPtr so we can automate the destruction routine.
Implement NiAlphaController and NiMaterialColorController
Implement NiFlipController
Set alpha value of character animations according to Invisibility / Chameleon effects.
Ignore invisible targets for combat AI
Break invisibility on Use or Activate
Add possibly missing include
Merge remote-tracking branch 'scrawl/master'