removed deprecated /plugins folder, updated vanilla package info to always

load the latest latest version - closes #438

package.json

@@ -43,7 +43,7 @@
     "validator": "~1.5.1",
     "nodebb-plugin-mentions": "~0.1.12",
     "nodebb-plugin-markdown": "~0.1.7",
-    "nodebb-theme-vanilla": "0.0.3",
+    "nodebb-theme-vanilla": "git://github.com/designcreateplay/nodebb-theme-vanilla.git#HEAD",
     "nodebb-theme-cerulean": "0.0.3"
   },
   "optionalDependencies": {