CVT Balancing

Nerfed small and medium CVT, buffed large CVT.  Small are for very low
torque engines, medium will run any medium sized petrol, and large will
handle anything.  Fixes #64
Forgot version update

...again ><
New Special Engines

-Added 1.0L I4 and 2.6L Wankel.
-Engine definitions can now specify pitch level.
Updates to XCFMenu:
Better gui
Automatic slider maxima
CVT support
Merge remote-tracking branch 'remotes/upstream/master'

Conflicts:
	lua/autorun/acf_globals.lua