Documentation about the command line tool in the
doc/getting_started.txt still tells you to call
'roundup-admin init' to create a new instance. With
init, you can only re-initialise a new instance and you
should issue 'roundup-admin install' to create a new
instance. 
What makes things worse is that there is an absolutely
unhelpful error message "Error: Instance has not been
installed" after having typed the instance directory
and having entered the admin pw (twice). Maybe updating
the error message to something like "init can only
re-initialise an existing instance, to install a new
one, use the 'install' sub-command" or something along
these lines.