Clarified which time units are expected by camera.setOrientation() and camera.setPosition().

git-svn-id: svn://svn.icculus.org/fs2open@10431 387891d4-d844-0410-90c0-e4c51a9137d3
Trunk sync r10431.

git-svn-id: svn://svn.icculus.org/fs2open@10432 387891d4-d844-0410-90c0-e4c51a9137d3