Much progress, now to an error to select ps or pdf

--HG--
extra : source : 96a774939560016208ca41d5b67dacc8f4e49fd5
now prints first voucher in list, but to screen.  So more minor issues to fix as we go forward

--HG--
extra : source : b3e76a6af59f1adca8a4f999a76252d196f64b6b
fixing id not found for printed document

--HG--
extra : source : 3e0f9acef365849b996bb884bd672a6752d442f9
Merge pull request #526 from einhverfr/master

Much progress, now to an error to select ps or pdf