Link to tools

Visitors should be informed about the existing tools and places for communication. These should include at least:

• login.libreho.st
• talk.libreho.st
• lab.libreho.st
• Riot/IRC channel (e.g. https://riot.allmende.io/#/room/#librehosting:matrix.allmende.io)

We can link them directly on top, but I find it better to link to a short description/explanation of the tool purpose and from there provide one (or more) links to the tools.