Improved ability.rb and some general refactroings
Merge branch 'develop-ak-cancan' into develop-ak

Conflicts:
	app/models/ability.rb
	app/models/employer.rb
	app/models/user.rb
	app/views/employers/_form.html.erb
	app/views/employers/show.html.erb
	config/locales/views/employers/en.yml
deleted some unused files