Add moon config value for disabling other mod generation.
Decrease mars monster spawn rate and make them only spawn below sea level.
Only decay leaves if there is an attached oxygen acceptor
Don't render spaceship in hands if player is inside a spaceship. Looked odd.
Dont' render spaceship overlay in first person. Player will have same third person view when they leave spaceship as when they joined.
Added config values for disabling spaceship overlay and disabling fancy tile entity rendering.