No payment of whatsoever is required to use this code: this is Free/Libre Software, nevertheless donations and funding are very welcomed.
I live in the Cuba island and the Internet is very expensive here; you can help me stay connected by fund me or simply donate the cost of a beer/coffee if you like to do so, of course more than one is allowed ;-)
If you like to contribute in this way please contact the author at pavelmc@gmail.com for instructions on how to do it.
Thanks before hand.