Create reasonably minimum amount of documentation

[boamaod]

The minimal documentation should probably explain:

• The basic rationale, scope and uses for the project;
• Using the example web service (explain the configuration properties);
• Cautions/instructions for running in practise (real elections, hacking contests etc);
• Running your own instance and modifying the code.

This should be more than enough for the code release... Wiki, readme or something else?

[boamaod]

There is now documentation served from /docs at:

• https://infoaed.github.io/pseudovote/