code: function Bundle(packages, name)
      {
          this.packages = _.map(packages, function (package) {
  
              if (_.isString(package)) {
                  return new Package(package);
              }
  
              return package;
          });
          this.name = name || 'bundle';
      }
docs: Bundle constructor
  @param {array}  packages  list of packages to include
  @param {string} name      optional name for the bundle