Add support for animation with variable frame timing.
Defer animation update to node and process in node's processUpdateBeforeTransform:.

Add CC3NodeAnimationState to bridge between CC3Node and CC3NodeAnimation and to
track animation updates for a single node. CC3Node extracts and blends animation
changes during processUpdateBeforeTransform:.
Add multi-track animation and animation blending.

Add multi-track animation to nodes. CC3Node can now contain multiple animation tracks.
Each CC3Animate action animates a single track. Add blend weights to animation states.
Add animation blending algorithm to CC3Node. Add CC3AnimationBlendingFadeTo action.
Add CSF and CAF resource file loaders.

Add CC3CSFResource & CC3CAFResource resource loaders. Add CC3DataReader data reader.
Add endian support to CC3Resource. Fix crashes when referencing certain CC3PODResource
properties after resource building complete.
Fix incorrrectly oriented CC3PODCamera animation.

Fix incorrrectly oriented CC3PODCamera animation due to coord mismatch in POD files.
Add quaternion multiplication, inversion & conjucation functions.