Tries to guess a number that is buried in the text.
Uses a set of heuristic rules which may work or not.
The idea is to extract the number so that it can be used as a sorting value in the column of a DPL table output.
Example[]
{{#dplnum:this is 4711 a text with a number}} returns: 4711
{{#dplnum:well above 47 Mio. US$}} returns: 47000000
{{#dplnum:13 Mrd}} returns: 13000000000
{{#dplnum:it is 47,123 Mio}} returns: 47123000
{{#dplnum:it is 47.123,56}} returns: 47123
{{#dplnum:it is 47,000}} returns: 47
{{#dplnum:it is 4.13}} returns: 413
{{#dplnum:it is 4,13}} returns: 4
{{#dplnum:it is 0,13}} returns: 0
