Feature Update - HUD, UI and Damage

UPDATED HUD: Moved all HUD items to top of the screen. Added a compass and a tilt indicator to provide real time feedback as well.

UPDATED UI: Redid the menus to be themed and cleaner overall

ADDED DAMAGE SYSTEM: Basic system that uses the helicopter's velocity to scale the damage. Rotor blades are critical components and you will lose a lot more health if you hit them (there is also a sound that plays when they are struck). No death effects yet, that will come soon.