data model for packages
first form with packages
improved form with package selection
title for package selection in form
Merge branch 'develop' into feature/price-models
translations and actication
email for package boocking and no downgrading of packages
Merge branch 'develop' into feature/price-models
enforcing package restictions
student show page only for premium employers
Merge branch 'develop' into feature/price-models
Merge branch 'develop' into feature/price-models

Conflicts:
	app/controllers/employers_controller.rb
	app/models/ability.rb
	app/models/concerns/job_offer_scopes.rb
	app/models/employer.rb
	app/models/job_offer.rb
	app/views/employers/new.html.erb
	app/views/employers/show.html.erb
	config/locales/views/employers/de.yml
	config/locales/views/employers/en.yml
	db/schema.rb
	spec/controllers/applications_controller_spec.rb
	spec/features/employer_pages_spec.rb
	spec/features/job_offers_spec.rb
	spec/models/employer_spec.rb
Merge pull request #403 from hpi-swt2/feature/price-models

Feature/price models