Massage require.js's config so that builds work

without underscore.js

config.js

@@ -45,6 +45,7 @@ require.config({
         "tpl":                      "node_modules/lodash-template-loader/loader",
         "typeahead":                "components/typeahead.js/index",
         "lodash":                   "node_modules/lodash/lodash",
+        "underscore":               "src/underscore-shim",
         "utils":                    "src/utils",
 
         // Converse
@@ -190,6 +191,8 @@ require.config({
         // for their 'jquery' dependency.
         '*': {
             'jquery': 'jquery-private',
+         },
+        'backbone': {
             "underscore": "lodash"
          },
         // 'jquery-private' wants the real jQuery module
@@ -222,6 +225,7 @@ require.config({
         'bigint':               { deps: ['crypto'] },
         'strophe.ping':         { deps: ['strophe'] },
         'strophe.register':     { deps: ['strophe'] },
-        'strophe.vcard':        { deps: ['strophe'] }
+        'strophe.vcard':        { deps: ['strophe'] },
+        'backbone':             { deps: ['underscore'] }
     }
 });

src/underscore-shim.js

+/*global define */
+define('underscore', ['lodash'], function (_) {
+    return _;
+});

src/wrapper-end.js

@@ -3,6 +3,7 @@ define('jquery', [], function () { return jQuery; });
 define('jquery.browser', [], function () { return jQuery; });
 define('typeahead', [], function () { return jQuery; });
 define('lodash', [], function () { return _; });
+define('underscore', [], function () { return _; });
 define('moment_with_locales', [], function () { return moment; });
 define('strophe', [], function () {
     return {