stubbed in folder for sphinx docs
starting to refactor partition and prop to use different masking scheme (based on class type)
updated MOAICollisionProp to use new factoring
got rid of MOAIFacet; MOAICollisionProp now inherits MOAIProp
fixed crash bug in MOAICollisionWorld destructor
Merge branch 'develop-plumzi' into feature/prop-refactor
better masking for spatial queries
improved image-paint samples; fixed ios sample xcode project