beautified the student overview table
fixed index test of student due to changed table
added a possibility to pass the localaization setting, (i.e. ?locale=de) as an url parameter throughout all of the application. This changed every url and therefor causes a lot of routing errors to occur in the current tests
modified some tests to adapt to the new routing system introduced by the localization
fixed the filter by chair function by deleting arbitrary plural ending from chairs to just chair
Merge remote-tracking branch 'origin/develop' into develop-js
Issue #83
deleted sidebar
Revert "Issue #83"

This reverts commit b7a724937d79f534f13c216e0f7d34359cd43818.
started pretty up studentsearch
removed jquery.ui for performance
#37
added status field to students
commit just for sync with felix, needs progress, #35
fixed some issues regarding new and existing ratings and students #35
removed debugger from students controller
Merge branch 'develop-js' into develop-js-rating

Conflicts:
	Gemfile
	Gemfile.lock
	app/assets/stylesheets/application.css
	app/controllers/students_controller.rb
Merge branch 'develop' into develop-js-rating

Conflicts:
	Gemfile.lock
	db/schema.rb
beautified the student profile site #81
resolved merge conflicts
#72 added programming languages and languages checkboxes
changed database.yml.default back to values used in the VM - reverts 5138632f95 [ci skip]