First try to get any collision between terrain and player.
Collisions between the player and a hard-coded plane.
Collision along normal.
Moved the collision detection code to updatePlayerPosition.
Added more hard-coded planes to collide with.

We need two planes become one only works in one 'direction'.
Added velocity to the player state.
Refactoring.
Apply gravity to the player.
Remove COMBINE_ZONE_PARTS.
Separate mesh loading and uploading for the terrain.
Move zone update stuff to update().
showCurrentRegion
Collide player and ground box using Newton.
Collide player and wall.
Hacks to test trimesh/capsule collisions with Newton.
Added collision trimeshes for all regions in the zone.
Bruteforce the collisions by skipping broadphase.
Added an option to toggle gravity at runtime.
Added a frame stat for the update duration.
Add sphere/BSP query to reduce the number of regions to test.