replace duplicated joinRealmNames() methods with a central public one
Inspector: add new ChronicleWindow, EventListBox
restructure event system

Move Chronicle class to TestApp. Remove ToString() implementations
in events and move the messages to Chronicle. Implement Event.Year
in Event class and abolish now useless EventBase class.
rename Genealogy.Chronicle namespace to Genealogy.Events
whitespace changes
fix TestApp: Chronicle was moved