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
- add support for color
- support non-uniform scale
- add GetImageBBox()
- fix SVG GetImageWidth/Height not being in mm
- fix import offset not being in mm
- add graphics importer for LIB_SYMBOL