WIP: UI Architecture for Module UI Components

The idea behind this is to have templates, javascript, UI Model Objects, handlers, and all relative information for any Assessment Module to be contained in its own child XBlock. For this release, they will not be child XBlocks, but still modular chunks iterated over by the base XBlock. 

This is still a work in progress. I want the team to be aware of what I am working towards. 

@ormsbee @jrbl