code: function(callback)
      {
          var params = util.extend({count:1}, this.params);        
          this.api.doRequest("GET", this.path, params, function(err, res) {
              if (err)
              {
                  return callback(err);
              }                    
              callback(null, res.count);
          });
      }
docs: /*
  cursor.count(callback)
  
  Retrieves the count of all items matching this query, and
  passes it to the callback function.
  
  - callback : function(err, count)
  Required