Adding wankel.

Adding wankel 2-3 rotor engines. They're more powerful but use more
fuels. (Wankels aren't very fuel efficient, but they're fast)
Updating wankel engine.

Oops. I forgot a few sections.
Adding generator to construction.
Adding power cables.
Oops. Fix that flag on the power cable.

I'm breaking more things.
Adjusting wankel, which should not show variable size.
Added recipe to create gasoline generator furniture.
Added gasoline generator part.
Added power cable object.
Added charging bench furniture object.
Added charging bench construction option.