Coordinate translation first try.
Added Letter to Number Conversion Tab

Signed-off-by: Thomas <thomas.helmke@gmx.de>
Added .gitignore

Signed-off-by: Thomas <thomas.helmke@gmx.de>
Conversion Letters to Numbers. Basic functionality.

Signed-off-by: Thomas <thomas.helmke@gmx.de>
Letters to Numbers with some Sums calculated.

Signed-off-by: Thomas <thomas.helmke@gmx.de>