Merge Dev

[dmitmatveev]

• fix Makefile
• fix dependencies
• small fixes in data_analytics_task.ipynb
• docs update

TODO:

• [ ] do Colab version for the repo, as plotly-plots showing will not work

[dmitmatveev]

• [x] add link from the #3 to README.md
• [x] add possibility to fig.show as images ('svg', 'png') options another ipynb-example. Default: interactive and render with nbviewer