Add more library functions

[boriel]

I completely agree I need other people to test these. I didn't write the original code, just reworked it from well known sources into shape; which means there are likely to be bugs.

I'll look into this one after work today.

Ok, I will later. :wink:
Ah, I forgot: please, put the URL or whatever of the original code (based upon: bla bla bla). Not only gives them credit, but also we can blame on them in case of a bug, like this! :mrgreen: