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/api/comments.js

@@ -0,0 +1,46 @@
+function thenGetComments(parentId) {
+    return $.getJSON(`/api/nodes/${parentId}/comments`);
+}
+
+function thenCreateComment(parentId, msg, attachments) {
+    let data = JSON.stringify({
+        msg: msg,
+        attachments: attachments
+    });
+    return $.ajax({
+        url: `/api/nodes/${parentId}/comments`,
+        type: 'POST',
+        data: data,
+        dataType: 'json',
+        contentType: 'application/json; charset=UTF-8'
+    });
+}
+
+function thenUpdateComment(parentId, commentId, msg, attachments) {
+    let data = JSON.stringify({
+        msg: msg,
+        attachments: attachments
+    });
+    return $.ajax({
+        url: `/api/nodes/${parentId}/comments/${commentId}`,
+        type: 'PATCH',
+        data: data,
+        dataType: 'json',
+        contentType: 'application/json; charset=UTF-8'
+    });
+}
+
+function thenVoteComment(parentId, commentId, vote) {
+    let data = JSON.stringify({
+        vote: vote
+    });
+    return $.ajax({
+        url: `/api/nodes/${parentId}/comments/${commentId}/vote`,
+        type: 'POST',
+        data: data,
+        dataType: 'json',
+        contentType: 'application/json; charset=UTF-8'
+    });
+}
+
+export { thenGetComments, thenCreateComment, thenUpdateComment, thenVoteComment }