Avoided call to any BL before login (so there is no Throw exception when db settings are invalid)
reworked error handling
now, in login, you get notified when no connection to DB can be established
some other exception-related work
Added MessageBox and implemented Error message on no DB connection
Merge branch 'work' of github.com:IAP12-16B/jManagr into work

Conflicts:
	src/ch/jmanagr/ui/users/UsersController.java
@mnewmedia added bug for you