René Paris authored Mar 03, 2021 and Reinhard Biegel committed Mar 22, 2021

- FindSphinx.cmake for precondition checks
- cmake flags WITH_DOC and WITH_API_DOC
- Add automatic version string for documentation
- Fix tab/spaces, and some name attributes in example configurations

Signed-off-by: Rene Paris <rene.paris@in-tech.com>
Signed-off-by: Reinhard Biegel <reinhard.biegel@in-tech.com>