Load message list over JSON

- Add jquery-load-template to bower
- Add moment (date rendering) to bower
- Load message list JSON via /api/v1/mailbox
- Render message list using jquery template
- Fix resize related problems with message list height caused by
  2092949dbc

themes/bootstrap/public/bower_components/moment/templates/default.js

@@ -0,0 +1,5 @@
+;(function (global, factory) {
+    typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
+    typeof define === 'function' && define.amd ? define(factory) :
+    global.moment = factory()
+}(this, function () { 'use strict';