app.js

requirejs.config({
  baseUrl: 'js',
  paths: {
    'lib': '../lib',
  },
  shim: {
    underscore: {
      exports: '_'
    }
  }
});
define(function(require, exports, module) {
    var $ = require('lib/jquery'),
        _ = require('underscore');
    require('lib/bootstrap/js/bootstrap');
    require('lib/date');
    require('lib/time');