#14 Register new user don't work, if no users.xml exists

[Peter Kehren]

I could not register an new user to chiki, if no users.xml
exists in my content path. I think, the system should
create a new users.xml file in this situation.

[alan gibson]

Logged In: YES
user_id=565208

FileNotFoundException catch block in
SimpleUserRegistry.getRegisteredUsers() should call method
to create users.xml from template. Or simply include default
users.xml with distribution.