Converting from subversion specifying config.svn.trunk results
in storing trunk under branch named as config.svn.trunk, where `default'
brunch is expected. Submission contains patch and test.
This enables minirst to parse and print option lists which have both
long and short options. Before, we could only parse option lists with
long options.
Use field list instead of option list in convert help, because the
option list format used, with defaults and type of argument is not
supported by docutils.
