message: Bugfixes after Changes from Lukas
diff: @@ -2,6 +2,8 @@ import {ICourse} from '../../../../../shared/models/ICourse';
  import {IFreeTextUnit} from '../../../../../shared/models/units/IFreeTextUnit';
  export class FreeTextUnit implements IFreeTextUnit {
  + updatedAt: string;
  + createdAt: string;
  _course: any;
  _id: any;
  type: string;
  