Repair Drone

New structure added v4.5 Dec 2017, repairs base buildings in real time.

Details
The Repair Drone flies out to repair structures within its range that get damaged, repairing them one building at a time.
 * The drone will not repair its own launch pad, but will repair the pads of other drones if within range.
 * If the launch pad is destroyed, the drone is also lost, even if it is already deployed.