- [feature] The naming of revision files can

- [feature] The naming of revision files can
  now be customized to be some combination
  of "rev id" and "slug", the latter of which
  is based on the revision message.
  By default, the pattern "<rev>_<slug>"
  is used for new files.   New script files
  should include the "revision" variable
  for this to work, which is part of
  the newer script.py.mako scripts.
  [#24]