Initialization (including required jpa-properties for db)

+ minor refactoring of ChatUser Persistence
project-setup-fixing
fixed and shortened data-Path
fxied problem with html-frontend not getting stop-script
jdoc
fixed some problems with initialization
registration and logout
bufix, wrong field used for initmode
logic for PasswordChange
initmode (forgot some stuff for that commit)
first level of backend-impl for Alerts
bugfix, linebreak