CocoaPods integration

Hi Bill

I made this a cocoapod (http://cocoapods.org)! See the podspec file. As soon as you approve the pull request I can add it to the main specs repo of cocoapod (https://github.com/CocoaPods/Specs), so it will be available thru cocoapods. Hope you like it.

And I separated the license from the readme, if you don't like that please leave the license file there, because cocoapods needs it.

Cheers
Simon