AOT compatibility enhancements (#2015)

* aot compatibility updates

- remove index files where needed
- move material dependencies to a separete module
- use aot compatible lambda functions for module export

* remove unused imports

* re-export Material module

* core module enhancements

- fix AOT issue with providers (use lambda instead of variable)
- move context menu to a separate module

* core module enhancements

* feature modules

ng2-components/ng2-alfresco-datatable/src/data/index.ts

@@ -15,5 +15,5 @@
  * limitations under the License.
  */
 
-export * from './datatable-adapter';
-export * from './object-datatable-adapter';
+export { DataColumn, DataRow, DataRowEvent, DataSorting, DataTableAdapter } from './datatable-adapter';
+export { ObjectDataColumn, ObjectDataRow, ObjectDataTableAdapter } from './object-datatable-adapter';