Fix the SuperTransport body type to be SUPER HEAVY, not HEAVY.
Try harder not to have them be on top of each other (only in MultiPlayer games).
Fix explosion type.
Fix damage calculations when they are on the ground.
Try to better balance the Super Transport, hitpoints now at 500, Armor types changed to 35 & 20 and make weapon MG1-VTOL instead of MG3-VTOL.
Fix picky compile issue reported by buildbot. :P
Merge branch 'bugfixes' into 3.1