fixed slightly imbalanced mod icon (it was very slightly unsymmetrical, by one pixel)

fix internal mod description so i don't have to edit its formatting every time i update this mod (which shouldn't be very frequent)

Version 1.1 - Optimization/Fix

- removed leftover modularmech.lua file that was unintentionally overriding any other mod's modified modularmech.lua file; hopefully this allows for more compatibility with other mods?
- changed how the flight code is handled; now instead of overriding the update() function entirely, it properly hooks and applies its code; note that the setFlightMode() function is completely overridden, but this should overall result in a less incompatibility-prone experience.