Split js from django template, move js to scripts , add requirejs support, and i18n for js

media/scripts/app/models/repo.js

@@ -0,0 +1,10 @@
+define([
+    'underscore',
+    'backbone'
+], function(_, Backbone) {
+    'use strict';
+
+    var Repo = Backbone.Model.extend({});
+
+    return Repo;
+});