Add section in "Sample Settings" how to parse decimal numbers

[stoeff99]

Add an example how to parse decimal numbers. In my set up this works: [+-]?([0-9]+.?[0-9]|.[0-9]+)
For numbers with a "," it would be: [+-]?([0-9]+,?[0-9]|,[0-9]+)

It took me a couple of hours to figure this out, so adding it to the sample settings section could save others a lot of research time

[Apollon77]

Thank you, I add this to the readme