Refactor: Transition dependencies

List of potential Transition dependencies and gotchas

Assumption is, if we removing transitions out of changePage(), what could bite?

$.mobile.urlHistory.pageTransitionQueue

Array, queue to hold simultanious page transitions, referenced in two areas of changePage()

$.mobile.urlHistory.isPageTransitioning

Boolean, indicates whether or not page is in process of transitioning, referenced in two areas of changePage(), always in close conjunction with $.mobile.urlHistory.pageTransitionQueue