Quizm Teach 2.0 [Ready for TBL Demo]

-Updated UI to Circles
-Support for Class List, Group Lists/PW, and Question Type Importing
-[notable bug: class list and question list must be same size]
-Added popover controller for collection views and many other classes
-completed both tab bar controllers [quiz and group variations]
-added detail text view to cells [start of questions]
-removed image from question cells
-ready for TBL Demo Video