#182 added ban checks in the guestbook module
#167 added a method for collecting all types of bans
#167 added configs with ban types
#167 added test for UserBanChecker
#167 added a user ban system
#182 Fixes and refactoring
#182 Refactoring and bugfixes in the guestbook module
Fixed checking roles and rights.
#206 Removed AuthMiddleware. Some refactoring