Cumulative update based on playtesting.

- Added a neutral Wraith in the centre. (Beta)
- Moved team Ghosts and Warthogs forward slightly.

- Removed Frag Grenades from the interior hallways.
- Changed Assault Rifles to Normal physics.
-- This change may cause ARs to be uninteractive.
- Moved the Rocket Launcher to the platform on the centre radio tower.

- Added semicircular cover to the outer promenade.
- Added trapezoid cover to the sides of the raised road areas.
- Extended the platform on the centre radio tower.

- Removed some windows on the tower to improve frame rate.