Cleanup (whitespace, unnecessary .gitkeep) (#20)

* Remove .gitkeep because it is not neccessary anymore

.gitkeep is used for tracking empty directories, but this directory
is not empty anymore.

* Use two spaces whitespace consistently

Author: maoberlehner

template/static/.gitkeep

@@ -2,19 +2,19 @@
   "name": "{{ name }}",
   "short_name": "{{ name }}",
   "icons": [
-      {
-          "src": "/static/img/icons/android-chrome-192x192.png",
-          "sizes": "192x192",
-          "type": "image/png"
-      },
-      {
-          "src": "/static/img/icons/android-chrome-512x512.png",
-          "sizes": "512x512",
-          "type": "image/png"
-      }
+    {
+      "src": "/static/img/icons/android-chrome-192x192.png",
+      "sizes": "192x192",
+      "type": "image/png"
+    },
+    {
+      "src": "/static/img/icons/android-chrome-512x512.png",
+      "sizes": "512x512",
+      "type": "image/png"
+    }
   ],
   "start_url": "/index.html",
   "display": "standalone",
   "background_color": "#000000",
   "theme_color": "#4DBA87"
-}
+}