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
* Frames moved: cvpcb, cvpcb footprints frame, gerbview, pagelayout editor
This also introduces new EDITOR_CONDITIONS that are used to set the
conditions of very common editor settings.
Also, some IDs were converted to tools in the pagelayout editor.
Jeff Young
Seth Hillbrand
Ian McInerney
Michael Kavanagh
jean-pierre charras