Check if GitHub pages are an option for the Emma project

[holzkohlengrill]

GitHub pages can be created relatively easy. Possibly it makes sense to provide the documentation also in this format.

It has to be evaluated

• if it worth the (maintaining) effort,
• if a user would benefit from this compared to the markdown and html files.

List of potential tools:

• https://www.mkdocs.org/

[holzkohlengrill]

Will be closed in favour of #31