Merge pull request #7 from LaneKelly/master

Added ticker view class
commit before merging
Added a new optional-use modal transition that extends UIViewController
Merge remote-tracking branch 'upstream/master'
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Merge remote-tracking branch 'upstream/master'
tick dispatcher, integrating more tiled objects
Merge pull request #8 from scottandrus/master

Merged in previous commits, added in optional transition from cells
more tick dispatcher
ticker ticking
finished event system and tick dispatcher handling direction changes
added assets
display tone images, highlight on tick
added afterTick to TickResponder