Blender Git Loki

* Documented that get/setOrientation use an inverted rotation matrix
* OB prefix is needed when specifying the object for the Message Actuator, this is very bad since other object fields in the BGE dont need this prefix - a real fix would need do_versions to keep old files running.
* RotationMatrix was all nans if the rotation vector axis was 0,0,0, Changed so in this case just return a matrix that doesn't rotate anything,

spent some angry hours to find these issues, maybe this will save others the hassle ;)