code: function(source, callback) {
          callback = callback || noop;
  
          //if there's a queue
          if (queue[source] instanceof Array) {
              //just call the callback
              return callback();
          }
  
          //otherwise there is not a queue
          //so let's create one
          queue[source] = [];
  
          var style     = document.createElement('link');
          var head     = document.getElementsByTagName('head')[0];
  
          style.type = 'text/css';
          style.rel = 'stylesheet';
          style.href = source;
  
          head.appendChild(style);
          callback();
      }
docs: Gets a style remotely
  and caches it.
  
  @param string
  @param function
  @return void