Added Serializer / Deserializer functions for reading & writing matrices. Added bool success parameter to Quaternion::FromLookRotation() and Node::LookAt(), as it can potentially give a NaN result (in which case the original rotation is kept). Optimized reading of math objects in Deserializer to avoid default construction.
Travis CI: API documentation update at 2014-04-01 10:40:37 UTC.
[ci package]
For Travis CI - switch CI build to use OS X build environment.