Recommendation is to avoid using the year nomenclature as this
information is already encoded in the git repo. Avoids needing to
repeatly update.
Also updates AUTHORS.txt from current repo with contributor names
This moves a fiddly little bit of logic used by a few UI
classes into a central location.
Also means that the paths dialog learns to expand the
first cell when it needs to (like the text variable
panel).
This puts generic logic for KiCad environment vars in
one place.
Also updates the DIALOG_CONFIGURE_PATHS help to document
the new KICAD_USER_TEMPLATE_DIR and KICAD_TEMPLATE_DIR.
Seth Hillbrand
Jeff Young
John Beard