Changes made to https://github.com/Vimux/Mainroad.git

- added slide theme for presentations
- added an Elasticlunr search widget
- added a data protection and privacy widget
- added data protection, location and author to partial footer.html
- layout for JSON (for search posts.json)
- list.html has a ranklist partial include (for the embedded search
  result)
- list.html: only display list in blog contents, not on toolbox or
  software section
- replaced Google fonts with Bunny fonts