clean-up doc 2.0 replaced by new 2.1 api-compared.asciidoc
clean-up doc 2.0 replaced by new 2.1 developer-guide--handle-results.asciidoc
removed (mock) install guide included now in user guide
removed landing page 2.0 replaced by new one (index.asciidoc) in 2.1
removed quick-start page 2.0, replaced by new on (developer-guide--source-provider.asciidoc) in 2.1
removed setup page 2.0 replaced by new one (user-guide--installation.asciidoc) in 2.1
brandver attribute by default allow to include the versions menu if navbar is asked