EventEmitter::emit is hot, more optimizations
Engine tick elasticity to mitigate thrashing
Color tint for renderable
Bigger chunk size for layer caching
Illustration tint
forceMove -> applyImpulse
TPS to config defaults
behaving -> isBehaving
Transition action on existent
Move invocation stuff to actions, out of routine
Context defaults, impl in entity, and improve Entity::invoke for v8 optimization

On branch master
Untracked files:
	src/avo/physics/abstractPhysics.coffee
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