added SceneStack class using stub implementation
replaced Transition.doIt with env.sceneStack.transitionTo
moved doIt from Transition to SceneStack
removed inclusions of Transition
removed Transition file
replaces transitionTo with loadAndRun
added menu map file
added push and pop operation to SceneStack
added possibility to change to menu Map
added attachFolder to datGui.prototype to enable reattaching and already
removed Scene folder