Remove unintuitive loop condition from ActorScroller
Remove unused variable from ActorScroller
Merge pull request #74 from dguzek/ActorScroller-bLoop

Allow ActorScrollers to use SetDrawByZPosition without turning off Loop
added ActorMultiVertex

AMV is an actor which can have a variable number of vertices that can
each be given their own pos, color, and coords. They can be drawn using
any of the RageSpriteVertex draw functions in RageDisplay.cpp. The
vertex properties can be tweened.
Merge pull request #117 from sigatrev/ActorMultiVector

created ActorMultiVertex actor class
lua docs for AMV
added AMV themer docs
Merge pull request #118 from sigatrev/master

lua docs for AMV