Added mod settings menu config options and did away with text file config options.

Fixed a null reference error I had added with the last update that would occur when trying to deconstruct the ball pit (whoops)

Pawns now affect ball physics while walking through them.
Optimised physics slightly again.

Changed how fast balls behave while the game is sped up. They shouldn't get thrown out of the pit any more.
Optimised the physics code a tiny bit.
A couple of misbehaving bits of code now do what they should be doing. Probably not even noticeable.

Added "option" for having balls speed up with time or not.
Fixed a problem where game speed would multiply the CPU load requirement of the ball pit.

[Auto-generated text]: Initial upload.