Created view specs for layouts/application main view.
Created view specs for shared/_error_messages partial.
Fixed failed specs during regression.
Created view spec for registration_notifier/registered view.
Implemented specs for UserAccountHelper class.
Implemented specs for SessionsHelper class.
Implemented specs for ParticipantsHelper class.
Moved part of ParticipantsHelper functionality to ApplicationHelper class. Covered it by specs.
Created spec placeholder for UserAccountsController class.
Implemented controller specs for UserAccountController class.