Artworks and Galleries

Don't merge. Todo: tests.
Nice. Love that you used a `BETWEEN` query here instead of less-than/greater-than. I think Rails recently added support for converting a `where` clause with a range into a `BETWEEN` query automatically. This should work:

```ruby
scope :recent, -> { where(created_at: Range.new(Date.today.beginning_of_day, Date.today.end_of_day)) }
```