Extracted the initialization code from initWithFrame in to a separate initialzeScrubber method that can also be called by other init methods (such as the initWithCoder method I added to allow a scrubber view to be initialized from a Storyboard).
Merge pull request #313 from jmacmullin/2df227d5aa3cbe969a667970c819ca0e5cddfc13

Allow NIPhotoScrubberViews to be initialized from Storyboards/xibs.