update documentation to use format recognized by cocoapods
update documentation to use format recognized by cocoapods

http://cocoadocs.org/docsets/ImageCoordinateSpace/0.3.1/Extensions/UIView.html#/s:FE20ImageCoordinateSpaceCSo6UIView12contentSpaceFT_PSo17UICoordinateSpace_

paulz/ImageCoordinateSpace,paulz/ImageCoordinateSpace