Made logged out template load from function.

logged_out is now attatched to the page by a method on the helper for
another template `home`. This template is rendered on / by iron-router.

This has been done so that the logged_out page can be loaded on the
condition that there is no existing session or cookie for a client.
In that case it would go to their dashboard.

For now the route is loaded from main but I don't know if this will be
the case forever, I may create a file client/routes.js