Speed up tests

See merge request !390

Allow board into the bestuur wiki

Closes #342

See merge request !392

Add help_text to summaries and exams to explain how to inspect files

Closes #295

See merge request !382

Add exam document type for answers

Closes #87

See merge request !384

Make sure the user creation form matches the field order of the paper form

Closes #132

See merge request !383

Make it possible to change the opengraph title per page and add more specific tags if preferred

Closes #270

See merge request !389

Translation mailinglist models

Closes #337

See merge request !386

Improve education app translation, filtering and searching

See merge request !381

Add filtering and searching to photos admin

Closes #219

See merge request !380

Force lowercase usernames

Closes #319

See merge request !374

Add translations for photos app

Closes #300

See merge request !372

Voegt een indicatie toe voor evenementen of men aangemeld is

Closes #123

See merge request !371

Improved Thabloid save function

Closes #114

See merge request !350

Now we're using `setUpTestData` more, not running some slow code,
using MD5 hashes for speed, and using bulk_create.

Also removes some dead code.

Extra tests for events

Closes #333

See merge request !369

Update translation howto in README

See merge request !385

Fix the shared album page rendering

See merge request !379

Add coverage configuration file

See merge request !378

Fixes lingering references to event.cost

See merge request !376

This field was renamed to event.fine in !368, but not all fields were updated.