Simple change according to Moment docs

On http://momentjs.com/ and http://momentjs.com/docs/#/use-it/bower/ it shows that `bower install moment --save` would be the typical approach to add Moment to a project using the Bower CLI. See also https://github.com/moment/moment-timezone/blob/develop/bower.json for how moment-timezone uses `moment` in their `bower.json` file.

Furthermore, using either `bower info moment` or `bower info momentjs` shows `name: 'moment',` in the retrieved record. I think `momentjs` is kept for historical reasons, but unfortunately couldn't find a reference to when this might have changed to just `moment`...