migrate git gateway backend

packages/netlify-cms-core/example/config.yml

@@ -1,11 +1,9 @@
 backend:
-  name: gitlab
-  repo: erquhart/blank
+  name: test-repo
 
 display_url: https://example.com
 media_folder: "assets/uploads"
 
-
 collections: # A list of collections the CMS should be able to edit
   - name: "posts" # Used in routes, ie.: /admin/collections/:slug/edit
     label: "Posts" # Used in the UI

packages/netlify-cms-core/example/index.html

@@ -4,7 +4,7 @@
   <meta charset="utf-8" />
 
   <title>Netlify CMS Development Test</title>
-
+  <script type="text/javascript" src="https://identity.netlify.com/v1/netlify-identity-widget.js"></script>
   <script>
   window.repoFiles = {
     _posts: {