5

ENHANCEMENTS:
* Ignacio Rodriguez port to gtk3

4

* Migrate to Cairo graphics

3

* Added save/restore
* Tune graphics to make rows more evident
* Fixed IndexError when cleaning up overlays

2

* Changed icon for Clear Button to eraser.
* Added white fill color to bones.

1

Napier's bones were invented by John Napier (1550-1617), a Scottish
mathematician and scientist. They help you to do multiplication.