Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Conflicts:
	CHANGELOG
	Gemfile
	VERSION
	app/models/group.rb
	app/views/groups/edit.html.haml
	db/schema.rb
	doc/install/installation.md
	doc/update/5.4-to-6.0.md