SLM: Epic Fight

A helper class was added for casting RL -> Animations.

An animation virtualization system was added, allowing multiple animation entries to be registered based on a single original Resource Location. The virtualization process occurs automatically via the pool during registration, or it can be called manually during post or in registry operations.

The virtualized animations are "new" in form, preventing their base from acting as a singleton with each other, thus preventing modification of A from affecting B and C. However, their properties, phases, ect; are preserved, functioning as a de facto Copiable implementation.

New access keys were added: "AnimationAccessorImplInvoker" and "AnimationManagerAccessor".

An issue where mixins were not being applied correctly was resolved.

Unnecessary calls to the SL Library runtime process were removed.