Layout work, fixes #36.

- Add a log database model that logs each upload. For now, use it to show
  a 'latest uploads' table on the front page.

- Remove all content buttons except for 'zoom to default location'

- Make styling of the tables in the interface more consistent

- table-hover makes it look like rows can be clicked. In the cases
  that that makes sense (project list on the front page, uploaded
  files with errors) we make them clickable, in other tables remove
  table-hover.

- Update site title, no longer just HDSR Upload Server

- Remove collage edit from Kaartlagen page

- Uploaders and project organizations go to the same project page

- Some minor layout fixes