#182 Refactoring and bugfixes in the guestbook module
Fixed checking roles and rights.
#206 Removed AuthMiddleware. Some refactoring
#206 Added HasPermissionMiddleware and HasRoleMiddleware. Refactoring.
#182 Added guestbook permissions
Improved installation process
#182 Some fixes in the guestbook module
Fixed the TimeToDate cast
Added the method getPerPage to the SiteSettings class