Add endpoints view class and display description for resources in UI

This change adds two primary things:

 * It makes adds an endpoint view class representing ends points in the spec

It does not change the DOM structure of the page, it simply adds in a representation in the code for endpoints that had been missing before.  This requires the changes in swagger.js from this pull https://github.com/wordnik/swagger.js/pull/37 .

  * Display the full description text for a resource (api declaration) within the UI

In our system we put some useful information into this description and would like to have it show up in the interface.

Note: This change does not go as far as to show details from the endpoint description within the UI or add grouping for endpoints.  It has all the pieces in place to do this and should be easy for someone else to extend if they need it.