Reuse as much as possible from other install instructions

[audreyfeldroy]

Start with:

• http://tutorial.djangogirls.org/python_installation/README.html
• http://pystar.github.io/pystar/setup_machine.html
• https://openhatch.org/wiki/PyCon_intro_tutorial_prep/Windows_set_up_Python
• Others?

TODO find out:

• License of those materials for adaptation/get permission to remix if needed
• Decide on a Python version (Python 2 and/or 3? #2)

[ceaess]

Others:

• http://docs.python-guide.org/en/latest/starting/install/osx/
• http://docs.python-guide.org/en/latest/starting/install/win/
• http://docs.python-guide.org/en/latest/starting/install/linux/

[audreyfeldroy]

@ceaess yes, starting with the canonical instructions of course 👍