login logic in sessions controller again
fixed login bug
fixed layout so applications are possible again
updated navbar
Merge branch 'develop' into feature/non-login

Conflicts:
	app/controllers/employers_controller.rb
updated navbar and dropdown
Merge branch 'develop' into feature/navbar
solving ambiguity issue for flow test
nginx configuration
using routes for base url
relative root url
Merge pull request #391 from hpi-swt2/feature/non-login

Feature/non login
Merge pull request #389 from hpi-swt2/fix/login-and-application

Fixed login and application
Merge pull request #397 from hpi-swt2/feature/navbar

Feature/navbar
reverting relative uri, adding new rewrite rules for nginx
nginx.conf
nginx.conf
nginx.conf
new config
new config