[basex-talk] How to contribute to basex? (Python 3.x and Python 2.7.3 client examples.)

Hi all. Because no client examples for Python 3.x, I wrote it. The code is for Python 3.x, and further more, for Python 2.7.3 with improving performance (a little). I want to contribute, but I had not found entry to contribute. I don't know basex-talk is fit for the purpse, but i'll post, sorry.

I hope these will be in https://github.com/BaseXdb/basex-api...

(my work is not perfect especially to process binaries, so, additional reconstruction are wellcome. In addition, as you will see, i'm not native English speaker, so docstring and comments are fairly horrible...fix up, please.)