Merge pull request #71 from ChrisGrant/master

Moving files.
Merge pull request #75 from ChrisGrant/master

Fixed #74
Fixed #72. The offset of the shadow wasn't being taken into consideration when expanding the frame.
Fixed #73. The view controller now uses the correct rendering method with a BYControlRendering layer.

Also added a constructor method to the BYBackgroundImage class.
Merge pull request #76 from ChrisGrant/bugs

Fixed #72.
Merge pull request #77 from ChrisGrant/bugs

Fixed #73.