Create a nice webpage for sharing-creates-value

[OliverFendt]

A nice webpage shall be created, so that internet surfers can find the page and learn what aim this project has and perhapy motivate the visitors to contribute to the project.
In order to do that the content at least of the Readme.md has to be changed in the first step. Others will follow

[OliverFendt]

first version is available.
Next work items are:
Logo in the repro: David provided logog in svg it shall be available in our repo
Footer update (adding links e.g. link to text of CC-BY-SA-4.0)
index.html update (new tools and adapted wording)

[OliverFendt]

Logo is available.
Next steps are:
Providing a presentation page
Updating the big picture and providing the big picture with instances