Better QtConsole for Jupyter integration

[XVilka]

See https://blog.jupyter.org/jupyter-qtconsole-4-4-81f2eaad5706

Perhaps the most exciting improvements are the enhancements to QtConsole’s ability to integrate with external editors and IDEs. Thanks to the Jupyter client-server architecture, you can integrate QtConsole with any editor you want, allowing you to assemble your very own Spyder/MATLAB-like IDE out of the components of your choosing. Marijn van Vliet, the author of the changes, demonstrates a few of the possibilities in a short video: 

https://www.youtube.com/watch?v=Fi_Xd6h4ncw

See also https://www.spyder-ide.org/ as an example of such integration.