Implemented depth peeling toggle, slice button

works, phi and theta roudness slider works and toroidal checkbox also
works, wiggle toggle/checkbox also works, triangulation of hollow
surfaces checkbox is also implemented, interactorstyle is a friend class
of aperio so can access windows ui member variable, removed old light
positioning/updates (using a vtkLightsPass now), replacing the 2th index
item in passes rendercollection