Remove an hmt import
Remove erroneous explanation from an unpublishing
Add a note reminding users that the reason for unpublishing is public
Add the organisation tab_navigation on the peoples tab
Merge pull request #413 from alphagov/some-data-migrations

Some data migrations

https://www.pivotaltracker.com/story/show/47282175 
https://www.pivotaltracker.com/story/show/47056697