feat($resource): Added 'suffix' parameter to $resource routes

-- Works with query (/resources.json)
-- works with get (/resources/1.json)
-- works with querystring parameters (/resources?color-blue)

Let me know what I need to improve or if this is still wanted. Pretty sure it addresses [this pull request/issue as well](https://github.com/angular/angular.js/pull/1211)  

Not sure if it's the best approach, but it works....