Added sort checkboxes, implemented sort function in model
minor fix: update action
testing locally helps. hopefully works now..
replaced checkboxes by radion buttons, implemented parameter passing
Merge branch 'develop-ja' into sort-job-offers

Conflicts:
	app/views/job_offers/index.html.erb

i

:x
finished basic implementation of date and chair filter
Merge branch 'develop-ja' of https://github.com/tkowark/hpi-hiwi-portal into crud-job-offers

Conflicts:
	app/models/job_offer.rb