Remove extraneous cell type registration
Added basic UICollectionViewController-based graph controller

Legend is nearly completed, works on rotate.
Added bars to graph with labels
Subclassed flow layout to add y-axis supplementary view
Updating pods
Merge branch 'develop' into issue/22-uicollectionview-graph
Oh CocoaPods, you so crazy
Redraw y-axis lines when rotated
Removed extra y row & centralized number of y lines in controller
Collection view is now accessible entirely
Removed moo cow label
Fixed warning with data type in NSString stringWithFormat
Removed TODOs and commented out code
Fixed some comments
Removed WPStatsViewsVisitorsBarGraphCell
Fixed a number of small nitpicky items I missed :)
Merge branch 'develop' into issue/22-uicollectionview-graph

Conflicts:
	StatsDemo/Podfile.lock
Merge pull request #25 from wordpress-mobile/issue/22-uicollectionview-graph

Replace graph with UICollectionViewController