initial retina work
Fix some issues with retina and add initial NSCoding support
Working on setCropToCircle with NSCoding and general cleanup
Revert some of the NSCoding implementation for now
Use correct UIImage with scaling
Work on animation and wording
Merge pull request #21 from RSully/retina

Merge retina changes and update loupe animation
Merge branch 'refs/heads/master' into loupe_performance

Conflicts:
	RSColorPicker/ColorPickerClasses/BGRSLoupeLayer.m