add name-format option to the three GraphViz reports

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/trunk@22013 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
give the "ahnentafel" report a user-settable title string
(since many English speakers do not know what "ahnentafel" means)


git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/trunk@22015 4ae1f11a-8b86-4847-b8af-ab372f36d1fd