code: function load(map, options) {
    var promises = [];
    var loaded = {};
    var filename;
  
    options = options || {};
  
    for (var key in map) {
      if (map.hasOwnProperty(key)) {
        if (!map[key] || map[key].length === 0) {
          continue;
        }
  
        filename = map[key];
        if (!options.external) {
          filename = path.resolve(ROOT_DIR, filename);
        }
  
        promises.push(loadSingle(filename)
          .then((function (_key) {
            return function (data) {
              loaded[_key] = data;
            };
          })(key)));
      }
    }
  
    map.loaded = loaded;
  
    return Q.all(promises);
  }
docs: Loads files from a given map and places them in that map's `loaded` field
  
  @param {Object} map The map of labels to filenames
  @param {!Object} options Load options
  @return {Promise.<Array.<Object>>} The same map with a `loaded` field
  populated with file contents