Add setup.py and requirements.txt

[karalekas]

These are essential for any Python project. They describe how to package and install the project, and how to set up a development environment for it in a repeatable way. As such, they are pre-requisites for implementing continuous integration.

[HGSilveri]

From what I've seen around, the requirements.txt is quite straightforward, although I still wonder: how can you determine what's the earliest version of a package that is required?

As for the setup.py, I've never done one myself and it seems complex, I could use some guidance with that.

[karalekas]

@HGSilveri if it's ok with you I'm going to open a PR with a barebones setup.py to get you started, and we can work together to add more to it. As for the versions -- you don't necessarily have to specify them at the start. But we can discuss how you might go about doing that.

[HGSilveri]

Alright, that sounds good. I'll use the same branch to include the requirements.txt (without versions for now) if that's ok with you.

[karalekas]

I'll put a requirements.txt in the PR as well, but feel free to edit it if you like!

[HGSilveri]

Even better, thanks!