Logged In: YES 
user_id=8719

i'd prefer to have a note on that in upgrading.txt and not
create custom install class.

please make a patch for setup.py if you wish, but don't
forget about binary distributions and windows installations.
 i wouldn't like to have binary distributions more difficult
to install than the source package.  i don't know how to
reliable do that check from binary installation (especially
on windows), so you will have to find that out yourself.

... hm.  alternatively, we could reject old-style templates
in roundup-admin install procedure.  this seems to be a
better way than doing the check in setup.py install.