trigger_hyperspace

This is a very rigid entity that doesn't allow for a whole lot of customization.

Requested changes:

-No more requirement that you be inside the trigger the entire time.

-Ability to pick which 'team' sound to use.. (Imp or Reb)

-Ability to work when facing any angle, not just 90. (When not 90, you don't teleport properly and the hyperspace fx is pointing in the wrong direction) -- This goes for both the trigger itself and the teleport destination.