Vue Comments: Comments ported to Vue + DnD fileupload

* Drag and drop files to comment editor to add a file attachment
* Using Vue to render comments

Since comments now has attachments we need to update the schemas
./manage.py maintenance replace_pillar_node_type_schemas

src/scripts/js/es6/common/templates/nodes/NodesBase.js

@@ -1,4 +1,5 @@
-import { thenLoadImage, prettyDate } from '../utils';
+import { prettyDate } from '../../utils/prettydate';
+import { thenLoadImage } from '../utils';
 import { ComponentCreatorInterface } from '../component/ComponentCreatorInterface'
 
 export class NodesBase extends ComponentCreatorInterface {