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 commit adds the PCB_ORIGIN_TRANSFORMS class, which is derived
from the ORIGIN_TRANSFORMS class, and provides a set of templated
functions to convert PCB coordinates between internal representation
and display representation. It extends the ORIGIN_TRANSFORMS class
to understand the three user-selectable display origins and the
coordinate direction display options.
