added price per unit to item details page

front-api/node_modules/Backbone.Mutators/bower_components/backbone/CONTRIBUTING.md

@@ -0,0 +1,22 @@
+## How to Open a Backbone.js Ticket
+
+* Do not use tickets to ask for help with (debugging) your application. Ask on
+the [mailing list](https://groups.google.com/forum/#!forum/backbonejs), 
+in the IRC channel (`#documentcloud` on Freenode), or if you understand your 
+specific problem, on [StackOverflow](http://stackoverflow.com/questions/tagged/backbone.js).
+
+* Before you open a ticket or send a pull request,
+[search](https://github.com/jashkenas/backbone/issues) for previous
+discussions about the same feature or issue. Add to the earlier ticket if you
+find one.
+
+* Before sending a pull request for a feature or bug fix, be sure to have
+[tests](http://backbonejs.org/test/).
+
+* Use the same coding style as the rest of the
+[codebase](https://github.com/jashkenas/backbone/blob/master/backbone.js).
+
+* In your pull request, do not add documentation or rebuild the minified
+`backbone-min.js` file. We'll do that before cutting a new release.
+
+* All pull requests should be made to the `master` branch.