Redo physics timing

Falling now has a set rate from world gravity instead of just falling
however fast you jumped.
Enemies now chase you once agro

Also fixed agro by instead of being agro to allies, they only copy the
agro sets from them.
Clean up and fix map clamping

We only really worry about X wrapping
Revert controller scheme for movement

Linux KeyPressed/KeyReleased is really buggy and irritating with Swing.
  A work around can probably be implemented, but I'm just not in the
mood to add one right now.
http://bugs.sun.com/view_bug.do?bug_id=4153069