Add capability to parse currency amounts given with suffixes (K, M, B, and T)

[RemyDuijkeren]

Allow to parse money with suffixes such as €126.36M, or -$2.45B. Four suffixes should be recognized: K, M, B, and T. They can be given in lower or upper case, but must directly follow the number to be interpreted as a multiplier suffix.

In this case K is thousand. The numeric value of Billion is culture dependent.

[JayT82]

The suffixes are multipliers, the valuta sign is another issue.
This can also be parsed, but then a list is needed with valuta signs and corresponding valuta unit.
Also Dollarsign is tricky!! You have Australian dollars, American, so a coop with cultureinfo might be needed anyway.

[RemyDuijkeren]

Parsing money already works (including dollarsigns), see the code & unittest. This issue is only about supporting the suffixes K, M, B en T.

[JayT82]

Also this page makes the distinction between Billion and Billiard, since they exist on different scales.
https://en.wikipedia.org/wiki/Long_and_short_scales