Add class to highlight active tag

See merge request !11

Related issue
qaul.net#106

Adds a class to the "currently active" tag in the tutorials tag filter.

- News section on the start page
- News page with all news of the web page

Instead of Zulip we are using the IRC channel as our developer chat.
The Zulip link was removed from the web page.

Every week we're having an open voice chat meeting on jitsy.
This information was added to the participation section.

Language enhancement on documentation site

See merge request !10

CI: fixed web site deployment

See merge request qaul/website!9

added CI script for web site

See merge request !8

changed github references to new gitlab repository

See merge request !7

* replaced the links to github with the new gitlab link
* changed the icon from github to generic git
* changed the bugfix icon to a bug
* set some infos about the qaul.net theme

Fix (github links): All repo links point to Gitlab server; Using Gitlab SVG logo

See merge request !5

fixed Freifunk claim

See merge request qaul/website!3

added new Freifunk logo

See merge request !2

* removed api.qaul.net
* added get.qaul.net

Feature documentation

the page /documentation links to all available documentations.
It is the target site that is redirected from
http://docs.qaul.net

put a fontawesome icon anywhere in the markdown file with the following
shortcode:

{{< fontawesome "book" >}}

The icons now use the local context for their size definition.

Added about section, fixed German language

* home link
* added symbolic links to missing language versions
* fixed tutorial tag link

* subpage partial added
* fixed list layout
* partner logos
* funders logos