First attempt to control user ability to rewind after a rewind
Fixing the endless loop issue when rewinding twice
Merge pull request #4 from SCPR/features/rewind-UI

Features/rewind ui
Add smaller play button to proj file, handle transition for playback launch when no ad is returned from Triton.
Merge branch 'features/more-preroll' of github.com:SCPR/KPCC-iPhone into features/more-preroll