Compatibility with jQuery 1.11.1 and 2.1.1. Close #4.

There was just a minor issue wrapping the anchor selector in quotation marks on line 180. 

To ensure backwards compatibility with jQuery 1.10 as well as compatibility with 2.1, I added multiple jQuery testing with this guide: http://markdalgleish.com/2013/01/testing-jquery-plugins-cross-version-with-grunt/. This might be outside the scope of this pull request, so I'd be happy to remove it.