Move the event attending string to the template
Merge branch 'master' of github.com:joindin/joindin-web2 into fix-attendee-string

Conflicts:
	app/templates/Event/_common/event_header.html.twig
	app/templates/_common/eventsummary.html.twig
Code cleanup: there should be no functional changes here
CSS tweak to the attending button to make it a bit smaller
Merge branch 'pr91'