code: function(url, options) {
              url = this.make_url(url);
              if (options) url = url + '?' + this.propToQueryString(options);
              return url;
          }
docs: Given a path and a dictionary of options, builds a qualified query string.
  
  @param uri {String} required; path to endpoint. eg. "search/jobs"
  @param options {Object} key / value par of query params eg. {'foo': 'bar'}