First version of the Excel workbook 'ExcelLifeBook'.
First calculations to mark ranges of years.
Some tests regarding the calculation and tagging of dates.
Deleted the MarkImportantDate-Code. Doesn't work as expected due to the simplification of 365 days a year (no leap years and 30 days avg per month.
Added all color markers for the different life spans.
Some visual changes (borders) and minor tweaks.
Minor changes and comments.
Updated README.ME for the ExcelLifeBook example.