Move all required python packages from notes to requirements.txt file

[Nutek]

Why and for what:

• Each python application/website/whatever should have requirements.txt file to point python dependencies
• Preparation of environment is much simpler with that file

Syntax of requirements.txt file is similar to output of command: pip freeze

Any example of use or implementation: To install all required packages: pip install -r requirements.txt

BTW: Usage of virtualenv should be a choice, not a requirement. This project could work without virtualenv as well.

[Xeverous]

Virtual env is not strictly required, I can state that in the docs.

Turns out I actually did not commit the requirements file, I can check what pip freeze outputs for me - I guess there will be few libraries which aren't required at all (just leftovers from some past experiments).

[Nutek]

Any way I believe requirements.txt could help to setup environment.

[Xeverous]

done in fe6e83b3123429c962536ff5c16436613577ec13