Changes from yesterday.

Added: Air License purchasing for EMS.
Added: Work-around for non Kart-Owners (Use Interaction key to get in
Kart, must be unlocked).
Added: Vehicle flip action to Interaction menu.
Added: Push functionality introduced for boats again via Interaction
menu.
Fixed: Vehicles pulled from garage were unlocked.
Fixed: Weapons would stay on the ground when a client did not fully
disconnect.