Fix notifications registrations
Merge branch '1-0-beta' of github.com:otvorenesudy/otvorenesudy into 1-0-beta
Merge branch 'master' of github.com:otvorenesudy/otvorenesudy into 1-0-beta
Refactor proceedings export
Merge branch 'master' of github.com:otvorenesudy/otvorenesudy
Merge branch 'master' into 1-0-beta