Created Podspec for CocoaPod functionality

- Needed to create a license for the repository, according to cocoa pod specification. I chose a GPL license, it seemed to match the intention of the repository.

- I moved the source files into their own directory so I can point to them from the cocoa pod

- I created the pod spec file, if this pull request is approved then I can add the pod spec into the cocoa pod repository (if I did it right!).

NOTE:

Please look over the cocoa pod, because it does require author and email address. I used your name and email address, please let me know if you would like me to change it to your username or any thing else instead.