Committing the dd feature in response to #16
create tests for .add
gulped out the dist files
adding a few more testaroonies
adding some more testaroonies
allowing selector string input
fixing tests for selector string
 - cash creeped back to $ when trying something, fixed.
Refactoring the $.fn.add method based on Ken's feedback, also update documentation and tests
Merge pull request #20 from simeydotme/master

new method: `$.fn.add`