Add documentation for new GreenNav modules

[fabianbormann]

We need to improve the docs by adding a description, property list and usage examples for
all important GreenNav modules:

https://github.com/Greennav/GreenNav/modules

[lemetice]

This link https://github.com/Greennav/GreenNav/modules leads to 404

[AnamikaD]

@fabianbormann @Flow42 is Algorithmic visualization available for GSoC?

[tom3012]

Improvement of the docs still needed. But since the structure of the project and docs has changed, description and usage examples must be added to greennav.io/docs and greennav.io/development