Create mailinglists application

Closes #25 

This is currently functionally equivalent to the old system. See #29 for new ideas.

See merge request !20

Complete photos app functionality

Closes #2

See merge request !17

Conflicts:
	website/thaliawebsite/settings/settings.py

This should probably be replaced again soon by something nicer,
but this is functionally equivalent to what we had.

Merchandise

close #7 

See merge request !19

Allow for storage of membership history

Closes #32 

Note that this should still be populated (#33)

See merge request !18

Boards page

Implement pages for the board

Closes #14 

See merge request !16

Usable photos app

Issue #2 is not fully resolved by this MR, as it does not include admin pages to manage the photos yet. Still, it seems useful to merge progress, especially since this adds thumbnailing. This does close #21.

See merge request !15

Conflicts:
	website/thaliawebsite/urls.py

https://docs.djangoproject.com/en/1.10/releases/1.10/#using-user-is-authenticated-and-user-is-anonymous-as-methods

https://www.djangoproject.com/weblog/2016/aug/01/django-110-released/