Fixed Travesty statue offset in wrong direction

The Travesty statue (Flat Man) was offset half a voxel in the wrong
direction. Minor fix to offset it half a voxel in the right direction.
Fixed wrong collision data on a few objects
Finished merge from master
Made bridges connect to all adjacent worlds

Also, minor performance boost by only adding about half the objects in a
world to the physics engine. It's not large enough to really matter but it
does help.