Fixed a bug that removed the sprite from the canvas, but not the project, and factored a bit more of the code in the canvas view controller into the canvas view.
Merge remote-tracking branch 'origin/master'
Modified toolbox to use UICollectionView instead of a table, and modified gestures to correlate to that.  Long presses now take 0.3 seconds to activate instead of 0.5 per the default value.  Also fixed the tutorial to match the UICollectionView.