message: needed to change var to public so that building with --prod would succeed
diff: @@ -90,7 +90,7 @@ export class MdlSelectComponent extends SearchableComponent implements ControlVa
  @ContentChildren(MdlOptionComponent) public optionComponents: QueryList<MdlOptionComponent>;
  private selectElement: HTMLElement;
  private popoverElement: HTMLElement;
  - private directionUp = false;
  + directionUp = false;
  private _isFloatingLabel: boolean = false;
  textfieldId: string;
  text: string = '';
  