Version 1.0

Original Prototype

Version 2.0

Made into Add-In, added documentation, added Colour Picker.

Version 2.1

Debugged Colourify engine to correctly handle text and null
cells.

Version 2.2

Added Excel 5 compatibility, added renameability of xla.
Debugged Colourify engine to accept "None" condition.

Version 2.3

Updating options added.  Initialisation file CColour.ini added
(to windows folder)