Add user profile
Adjust styles on Thing view
Format owner list, with links to user profiles
Use short render form for Thing partial
Rename _transfer_brief to _transfer
Give transfer history a heading
Order transfer history by descending datetime
Convert raw times to time_ago_in_words
Correct scoping for current_user's owned things
Disambiguate Things association
Remove association through transfers, add TODO to specify it properly
Add TODO to group lent things view by user
Fix User associations to Transfer
Change "Transfer History" heading from h3 to h4
Update group by user todo item
Add user profile links to transfer lists
Add link to holder profile from _thing partial.
Add last_transfer method to Thing
Reposition owner list to before the borrow button in Thing partial.
Group Things by holder in the lent Things view.