Made RoundedUITableView ARC and iPhone 5 compatible

Hi

Thanks for your great RoundedUITableView. I found it on cocoacontrols.com and will probably use it in my app. I saw that it isn't ARC compatible and the demo has no iPhone 5 support. I forked it and made those changes. It's now compatible with iOS 5 and later.

Don't hesitate to contact me if you have any questions!

Regards,
Florian Friedrich