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
Our names tend to have more boiler-plate stuff at the
end (excluding things like "Position X" and "Position Y",
but they're usually pretty short when compared to
"Solderpaste Margin Ratio Override" or
"Exempt from Courtyard Requirement").
Removes old defines and work arounds for earlier wx versions and adds a
CMake requirement to use at least 3.2 (or the minimum matching wxPython
version)
