Rename sponsor-logo to topicus-logo

Closes #162

See merge request !182

Add icons + change template

Zie issue #154.
Getest op Android.

See merge request !180

Sort committees by localized attr names

See merge request !181

Student Participation page

Closes #93

See merge request !179

package was renamed, but not all references were fixed

Import newsletters

Basic newsletter importing, not perfect but good enough.

Closes #97 

See merge request !177

Use sponsor logo from the newsletters app static, since this logo is always correct (transparent + white) and the uploaded logo might not be.

Add album downloading

Zip files are put in /tmp/ then served with sendfile

Closes #73

See merge request !169

Zip files are put in /tmp/ then served with sendfile

Added a check all as present and paid button

Closes #89

See merge request !174

Improve membership migration

It's not ideal but it works. (#156)

See merge request !175

Fix ALLOWED_HOSTS when env var is not set

See merge request !176

This was a problem for people without an infix

Get docker ready for production

See merge request !173

Adds a event_permissions attribute and checks

Allows to ban users from attending events in a discrete manner

Closes #144

See merge request !167

Offer same API as old site

Wolktm can't be deprecated because Django doesn't do longpolling(yet).

Closes #56

See merge request !156

Add various missing translations

Closes #153

See merge request !172