Minor update to the game...

A lot of tweaks and quite a few bug fixes...

• Improved gun camera, locks forward in rocket mode, autolocks in missile and cannon mode.
• Left Shift Key drives helicopter downward.
• Improved terrain noise and wrapping around of terrain and buildings/trees.
• Gear up down with the G key
• Missiles fired from sides.
• Pooling of weapon rounds to improve performance.

Still lots to do BFN...