I have found an app online using AngularJS with Lodash. The way Lodash is included is simply by adding to the body the following line (after having included angular):
<script src='vendor/lodash/3.3.1/lodash.min.js'></script>
<script src='myApp.js'></script>
Inside myApp.js, the first line is :
/* global angular, _ */
And then you have access to Lodash (using _) I am not sure to understand why it works...