Multiprocessing

[luiztauffer]

based on: #4

@eyalk11 I had to create this new branch in order to test your code, update the version, fix linter, etc...
There's still some problem I'm getting with this version, when installing and running from a new, clean environment. The basic example simple_window_with_qtvoila.py doesn't render the Voila notebook, do you have any idea why?

the error track on terminal:

[Voila] WARNING | Notebook temp_notebook.ipynb is not trusted
[Voila] WARNING | Native kernel (python3) is not available
WARNING:tornado.general:500 GET / (127.0.0.1): No Jupyter kernel for language '' found
ERROR:tornado.access:500 GET / (127.0.0.1) 44.71ms
ERROR:root:exception in voila HTTP Error 500: Internal Ser

loading an external notebooks seems to work fine