Fix/export event data

closes #258

See merge request !284

Add Open Graph tags.

Closes #260

See merge request !283

Makes the starting year for fixture users truly random

See merge request !280

Add 'ordering pizza' to the menu

Closes #251

See merge request !279

Add link to iCal event description

Closes #244

See merge request !278

Zet een stukje voor media styleguide dat ok zegt

Closes #242 

Fixt ook meteen een vertalingsfout

See merge request !281

closes #242

Users on members page are now sorted nicely

Descending sort by starting year, then ascending sort by first name.

Closes #246

See merge request !277

Add Mercator to map_location field help text

#238 

See merge request !276

Descending sort by starting year, then ascending sort by first name.

Produce warning when ignoring non-photo file

Closes #262

See merge request !275

Fix language for newsletter image in email

See merge request !268

Mark .otf files as binary in .gitattributes

See merge request !273

Added .gif files as binary in .gitattributes

See merge request !272

Fix user variable in welcome email

The  `user` variable doesn't work due to the use of `blocktrans`.

Closes #256

See merge request !269

Update leading text for partners

Closes #248

See merge request !258

Prevent error where '*_None' field does not exist

Closes #233

See merge request !266

Fully prevent redirecting to logout page after login

Als je nu uitlogt vanuit de backend en weer wil inloggen dan wordt je na te inloggen direct uitgelogd vanwege de ?next waarde. Er zit een check maar die werkt alleen voor `/logout/` en niet voor `/admin/logout/`

See merge request !267

Add (very) old ical URL to the deprecation feed

See merge request !265

Extend pizza product admin page and link from front-end

Closes #229

See merge request !263

Implemented random-as-a-service API

Closes #255

See merge request !264

Fix wrong translation for "Order" in de pizzas module.

Closes #252

See merge request !260