Merge branch 'release' into 'master'

Makefile

README.md

api/authenticatedChannel.go

api/client.go

api/notifications.go

api/permissioning.go

api/user.go

api/version_vars.go

auth/callback.go

auth/confirm.go

auth/request.go

bindings/dummy.go

bindings/group.go

bindings/notifications.go

bindings/notifications_test.go

bindings/preimage.go

bindings/ud.go

cmd/group.go

cmd/root.go

cmd/single.go