-buggy stops supplying power when it runs empty
-better logic for power providing. Supply matches demand as long as not strained.
-output can be strained using Home/End/Pgup/Pgdown keys.
-corrected cost and building time back to original

-QOL change : increase/decrease output power with pgup / pgdown now goes faster in the higher range.

-Update on units of fuel flow, now shown in units / hour
-Modes can now also be controlled by keyboard keys 1-2-3
-logic for using Charger MK2 as a power supplier