initial setup for php-resque background jobs
print single event
Merge branch 'devel' of https://github.com/ecamp/ecamp3 into feature/jobs

Conflicts:
	composer.json
	composer.lock
Weiterentwicklung
Weiterentwicklung
EventPrinter + wkhtmltopdf module
BasePdfPrinter
change job naming; fixes for linux
BasePdfPrinter