Code cleanup. Removed Camera functions to return forward, right, up vectors as they are now also in Node. Added Lua property accessors for Node up/right vectors. Exposed SmoothStep() to script. Modified Node::LookAt() to use the new Quaternion function. Updated credits.
Travis CI: API documentation update at 2014-01-18 19:04:40 UTC.
[ci skip]
Added example of manual bone control to CharacterDemo. Added a version of Skeleton::GetBone() that takes a C string parameter to avoid ambiguity.
Added a convenience function to find the angle between two vectors.