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
Gerbview did not handle redefinition of variable like $3 = $3 / 2
This redefinition is sometimes found in Gerber files.
This is a long standing issue now fixed.
Fixes#7222https://gitlab.com/kicad/code/kicad/issues/7222
