Added podspec

Greetings, and thanks for the awesome component!

I added a podspec to the Cocoapods repository here: https://github.com/CocoaPods/Specs/pull/12277

You can read more about cocoapods here: http://cocoapods.org/

In this pull request I added the podspec submitted to cocoapods, as well as updated the .gitignore and Readme to reflect cocoapods.

Please let me know if there are questions or issues.