Add ``is_draft`` method to the ``Hub``.
Add ``NetworkSpeed`` section in the admin.
Update the ``Hub`` fields in the detail view.

https://github.com/madewithbytes/us_ignite/issues/169

The fields in the detail page of the hub are listed in
the detail page.
Add management command to load initial ``Network Speed``

https://github.com/madewithbytes/us_ignite/issues/169
Update initial fixtures loader.
Add ``connections`` field in the ``Hub`` page.

https://github.com/madewithbytes/us_ignite/issues/169
Update search indexer to consider updated ``Hub`` fields.

https://github.com/madewithbytes/us_ignite/issues/169