New routine in the development version (2) : NInStr

[Benoît Minisini <benoit.minisini@xxxxxxxxxxxxxxxx>]

Hi,

I added another new routine, NInStr(), that counts how many occurence of 
a string is inside another string.

It has an UTF-8 sister in the String class.

The documentation is at: https://gambaswiki.org/wiki/lang/ninstr

Regards,

--
Benoît Minisini.