Don't look at this commit too closely until after netgame, I want to surprise yalls!!

* Lots of menu changes!
	* Little arrows next to changeable cvars!
	* Show default value for sliders!
	* Pretty pretty pretty.
	* I don't know how to describe some of these changes.
* Effectively nuke MIDI music support!
* Skiddown at the start of a race is more interesting!
* Spinning in waterslides!
* Tiny bugfix in voting, plus a little celebration...