setup.py and installation configuration

[goodmattg]

good CV repositories are written as installable modules. Other researchers should be able to either pip install or git clone your project, then use your code as an extension of new research.

• correct Python project structure: project format
• correct setup.py file structure: [setup.py format](https://github.com/navdeep-G/setup.py
• documentation in README to explain installation

[mchiquier]

Let's merge this with "Training scripts that check that all the files and directories you need exist before you start" ?

[goodmattg]

That's more of a utility for when you run any training script? The idea of this is setting up the overall project structure