Port r9738 from zookeeper branch: Forgot this from r9728; makes changing eyepoint orientation affect chase view as well.

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@9866 387891d4-d844-0410-90c0-e4c51a9137d3
Port r9823 from zookeeper branch: Added an option to make pitch and yaw axes be determined by eyepoint orientation.

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@9867 387891d4-d844-0410-90c0-e4c51a9137d3
Port r9734 from zookeeper branch: Added scripting function to enable/disable tips of the day in mainhall.

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@9868 387891d4-d844-0410-90c0-e4c51a9137d3