Added cocoapods.

Removed the dependencies that I added before (AFNetworking, JSONModel) and added CocoaPods. To use the project now, you have to navigation in Terminal to the project root folder and run "pod install" to get all the dependencies needed. An Xcode workspace will be created after running pod install, use the workspace  file instead of the Xcode project file.

You'll need to install CocoaPods via Ruby Gems first.