Proper installer.

[rec]

We need a proper installer for the program - this is a can of worms...

[rec]

Includes #537

[rec]

It will be setuptools:

https://stackoverflow.com/questions/6344076/differences-between-distribute-distutils-setuptools-and-distutils2

[rec]

Includes #554

[rec]

Includes #223

[rec]

https://python-packaging-user-guide.readthedocs.org/en/latest/index.html has been interesting.