Add lodash includes as an alias for contains

As we use an older version of lodash, _.includes is not a function.
So we have to add the alias ourselves.

This is related to the following restangular issue on github:
https://github.com/mgonto/restangular/issues/1314

frontend/app/global.js

@@ -71,3 +71,7 @@ require('angular-ui-select/dist/select');
 require('angular-ui-select/dist/select.css');
 
 require('restangular');
+
+// 'includes' is not a function in older versions of lodash, so we need to substitute
+// due to the update related to https://github.com/mgonto/restangular/issues/1314
+_.includes = _.includes || _.include || _.contains;