Added 3 new helpers additions to data-ajax functionality
* data-ajax-append : appends the URL contents to the element
* data-ajax-before : put the URL contents before the element
* data-ajax-after : puts the URL contents after the element

Optimizations:
* removed the data-fetch into it's own event to allow for uniqID generation of ajaxed content to prevent collisions
* function now available to all elements that require ajax-fetching
* added a misc glod in the coffeescript to bring over .txt files. This could be improved but is required for ajax files
Merge pull request #2984 from masterbee/plugin-data-ajax

Added 3 new helpers additions to data-ajax functionality