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.
Page layout editor: Add bitmap items to the page layout existing items.
Now a bitmap image can be added to a page layout description. Currently the bitmap is expected having a 300 ppi definition.
Note: not all plotters can plot a bitmap, and in this case the bounding box is plotted instead of the bitmap
