Stubbed out directions VC
Basic implementation of directions screen
Added in direction arrow annotations
Merge pull request #291 from MIT-Mobile/3.6/dev-intrepid-svoigt

3.6/dev intrepid svoigt
Set up basic collection view for main stop selection in footer
Implement collection view paging via custom layout
Implement infinite scrolling with custom UICollectionView
Set up "Near Here" collection view
Add numbering of stops in collection view cells
Polish collection view cell layout
Add cell highlight for currently selected stop
Adjust collection views so user cannot accidentally swipe the page
WIP: Load content on stop selection