Package code and make pip installable

[cthoyt]

It would be nice to make this code pip installable and to use entrypoints to make a vanity script through which the scripts can be run. I'd be happy to send a PR next week. Have a nice weekend, cheers on your new manuscript.

[Dierme]

Hi, @cthoyt
Yes, definitely. Entrypoints already exist, I just need to describe them in re README. I will write extensive documentation on the weekends. I will also try to find time to create a setup.py. Otherwise your pull is welcome!