Updates for the hosting pages

[mrchrisadams]

I'm adding the notes here from the screen sharing session with Rene and Shreya. These are seem the most useful things to make it easier to update the hosting data.

• [x] list the user that belongs to this hosting organisation on the same page, and link to them
• [ ] allow comments on the hosting provider page - so we know when they've been updated, or need someone to verify the data
• [x] list when requests to addition IP ranges or ASN were made, and approved
• [ ] think how to show data about the ASN on the hosting page (perhaps peering DB) see #74
• [ ] add editable preview for contacting hosting provider

[mrchrisadams]

Further notes, and requests for updates:

it would be extremely helpful if we had a tickbox where we could say 'checked' or something like that, to show that the entry was checked and still valid. We could use that date and time for selections later, like generate a page where the eldest entries / the ones that went unchecked for the longest time, are shown first.