Created a better system for tracking damage multiplication.

Also made damage multiplication be used in the proper locations.
Properly handle attackers who win with > 1 attack.

Also nerfed the fiery attack ships, because 3 attack was way too much.
Added aura-type buildings, and made one for lava planets.

There's no graphic for it, but just pretend it's there.
Depleted volcanic planets change in looks and effectiveness.

It's still purely timer based now. Next step would be to make the buildings cost lava to use.