Bugfix: Avoid using 'isActive' as a validator, since a safeEntityReference may be called before the entity is actually registered with the world.
 Define repo for artemis-odb snapshot.
 Separate color from anim component.
 Move Color and  ColorAnimationSystem out of libgdx component module.
 Add layer only constructor to Anim.
 Bugfix: Asset system does not return added animation.
Separate Anim into Anim, Renderable and Color.
Add support for stacking up to two animations in one Anim (temporary workaround).
Add utility classes.
Add system for deferred processing via an agent/principal system.

@Junkdog Allows for a-typical entity processing order by letting one
system dictate it for several subsystems, for example a render system
with specialized subsystems for text, maps, animations.
Port animation rendering to principal/agent system.