releases/6.9 collects:

* tools/amforth-shell.py fixed python3 error (in --no-error-on-output
  option path), fix provided by Tristan Williams.
* tools/amforth-shell.py fixed indentation error in line 1146, fix provided by Tristan Williams.
* tools/amforth-upload.py fixed logic error in search_and_open_file
* tools/amforth-shell.py ported to python3, patch contributed by
  Tristan Williams, thank you!
* Added refcard manually generated from 5.5 with a warning! This is outdated!
* Commented Projects/ClockWorks: added version from 2018-12-15; they were apparently
  lost or never published on the website. This version features a clock reading the
  DCF77 time radio signal.
* core(AVR8): restored avr8/words/no-jtag.asm from release 5.5; removed not functional
  avr8/devices/\*/words/no-jtag.asm files
* added one-line patch to amforth-shell.py, provided by Tristan
  Williams. Will now report filenames which occur more than once.
* added :ref:`NewMaintainer_fixing-dgreaterzero` to :ref:`Opinion`.
* added a new section :ref:`Opinion` for blog type pieces of text.
* core(AVR8): fixed :command:`d>0`, reported by Martin Nicholas.
* April 2020: friendly takeover of new maintainer
  (see `this email message <https://sourceforge.net/p/amforth/mailman/message/36959799/>`__)