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
Some classes had been originally designed to be usable separate from wx,
but over time our uses of the classes have become entertwined with wx
features (e.g. colors), and various changes have also leaked wx into the
classes unguarded. So just remove the option to hide wx in those classes
to simplify the code.
