adding to scotty's answer:
Option 1: Either include this in your JS file:
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.0rc1/angular-route.min.js"></script>
Option 2: or just use the URL to download 'angular-route.min.js' to your local.
and then (whatever option you choose) add this 'ngRoute' as dependency.
explained:
var app = angular.module('myapp', ['ngRoute']);
Cheers!!!