Added helper category methods and cocoapod specification

Hello, I appreciated the work you did to put together the plist file and thought I would throw a little more into this to make it easier for developers to use.  I am an iOS developer and use cocoapods quite a bit at work so I threw together the helper classes plus put together the podspec to make it all work.  I'm going to submit a pull request to the cocoapods/specs repository to pull in the new spec pending your approval of this pull request.

Just FYI, I am a bit of a new github user, and I'm learning my way around git revision history management.  I realize that there really are kind of a bunch of starts and stops in the commit history of this pull request.

If you really are passionate about it, I can clean it up some before I send another pull request.