* Add README.md to comply with spec -
  see feature "org"

What works:

* Print to brother4040 PDF 1.3 files from USB stick
* Print to brother4570 (any?) PDF files from USB stick

Pending:

* Print to brother4040 from network
* Print to brother4570 from network
    * apt install cups openprinting-ppds colord-
    * cupsctl --remote-admin
      (or: perl -i -pe 's/(\s*)(Order allow,deny)/$1$2\n$1Allow \@LOCAL'/g /etc/cups/cupsd.conf
    * lpinfo -m
    * lpadmin -p brother4570 -E -v socket://brother4570.jones.dk -m openprinting-ppds:0/ppd/openprinting/Brother/BR4070_2_GPL.ppd
* Print color-managed to brother4570 from network
* Document how to print
    * Cancel failed/hanging print job in CUPS
* Document how to color calibrate printer

What doesn't work

* exporting odt file to pdf (directly to pdf) and printing from USB stick
* exporting odt file to PDF/A-1b and printing from USB stick
* exporting odt file to PDF/A-1b, converting it to PDF 1.3 prepress gray with localpstopdf13prepressgray and printing from USB stick