List ``HubRequest`` in the admin section.
Add factory to generate ``hubs`` fixtures.

The fixtures are helpful when DB objects are required.
Add get admin url method to the ``HubRequest``.

https://github.com/madewithbytes/us_ignite/issues/95

This link will be helpful when reversing the request
to an area in the admin section.
Add function notify ignite about a new community request.

https://github.com/madewithbytes/us_ignite/issues/95

The function will email US Ignite and notify about
the new request. The emaill will contain some details
about the user and a link to the admin to determine
the next course of action: approve or decline.
Hook notification with the community application view.

https://github.com/madewithbytes/us_ignite/issues/95

The notification will be sent as soon as a user
submits an application.