Updated dueling v1

-Corrected Ultiduo elevator clipping issues, players will no longer clip
through the elevator when they stand on the edge. (Thank you Dave_ for
identifying and correcting this issue)
-Created a fix for the spire model clipping issue (identified by
MightyMe) by using a player clip brush. Players should no longer become
stuck on the area of the spire identified in post #69 when they are
brushed up against the wall. I will also implement this fix in MGE
Training V8 if it has been proven to correct the issue.
-Created player clip brushes to overlay the 2fort "shack" model on
Spireking. Players should no longer get "stuck" on the roof peak
anymore.
-Raised the skybox in bball by over 100% to please the people who
apparently enjoy hitting the ceiling more than playing MGE (just
kidding). I plan on carrying this over to the next MGE V8 release as
well.