Leveraged underscore templating to allow dynamic html to be generated based on each model in the collection

Passed the model through so that users can submit templates to the collection binder instead of just simple html strings

Developed in response to issue #148, but I created it generically so that it passes the whole model through.  This does not interfere with current functionality, anyone using basic html strings will simply pass through _.template and come back exactly the same without modifications.