Moving the user management permission somewhere sensible

Where it was before dates back to before there being a user
model
Add a permission for service management
Show last login dates rather than email addresses
Slightly friendlier welcome message
kanisa_from_kaleo can now import users and permissions
Version 0.8 is done

There's lots more to do before we get something releasable,
but we're at least on the way now :)
Add a note about bands