gnucash-docs maint: Update README

[Frank H.Ellenberger]

Updated	 via  https://github.com/Gnucash/gnucash-docs/commit/e903525f (commit)
	from  https://github.com/Gnucash/gnucash-docs/commit/1a8c502d (commit)



commit e903525f16096c9f717cca6b439e51336a217e99
Author: Frank H. Ellenberger <frank.h.ellenberger at gmail.com>
Date:   Thu May 9 03:59:55 2019 +0200

    Update README
    
    Dependencies:
    new: FontBox for ru pdf
    downgrade rarian
    
    Known issues:
    remove outdated list
    update Bug URL



Summary of changes:
 README | 35 +++++++++++++++++------------------
 1 file changed, 17 insertions(+), 18 deletions(-)