be more conservative in changing selection
save registered launchers between refreshes
doc update
make windows invisible until needed
track destroyed events
recognize created and destroyed launchers.  problems with group tracking
move from created to grouped
extract persistence
refactor serialization
detailed persitence
track launcher attributes
doc update
notice other launchers on bulk select
possible to select a unit before its created event fires
note dependecy in changelog
engine.asyncCall not available at load time