Add documentation to get started

[mark-watson]

Please add some documentation, specifically for the Python interface. (build and run example code).

Thanks!

[guenchi]

I'm just working on it 👍
https://github.com/guenchi/Enchantment/blob/master/manual/python.md

There's a little exemple explain how to run Numpy on Chez:
https://github.com/guenchi/numpy

[mark-watson]

Thanks, I needed the part to build the .so file.

[guenchi]

@mark-watson It's clear now?

If you wrote a makefile, welcome to PR : )

[mark-watson]

there is a typo in line 25 of README.md, should be:

                    (py-mul np-pi 

[guenchi]

there is a typo in line 25 of README.md, should be:

fixed, thx! 👍

[guenchi]

@mark-watson Pay attention to change of py.c