Merge pull request #8 from johnhaitas/master

Storyboard support
Call out need for `-ObjC` linker flag in readme
Update Podspec to add -ObjC linker flag.
Merge pull request #9 from johnhaitas/master

Improve interoperability between CKRefreshControl and UIRefreshControl classes
Merge pull request #10 from johnhaitas/master

small fix for import of runtime header in CKParagraphStyle