initial commit
Update README.md
Update README.md
Update README.md
Update README.md
Implemented IAnimatable. Disposing atlas optional.
Replaced incomp. dispose() w/ disposeWithAtlas
AddedOpenPDParticleSystem.

Added OpenPDParticleSystem (no different than PDParticleSystem, but
extends OpenParticleSystem). Extended that to make
AnimatedPDParticleSystem.
Merge branch 'master' of https://github.com/devon-o/Starling-Extension-AnimatedParticle-System

Conflicts:
	.gitignore
	README.md
Merge branch 'master' of https://github.com/devon-o/Starling-Extension-AnimatedParticle-System

Resolving Conflicts:
	.gitignore
	README.md