Set title proper for impressum
Updated jobs.md to say that there is no.

Also there is the direct link for us admins to update.
Added vita page for A. Hoffmann
Added Page for Hoffman Lab

according to the doc Prof. Hoffmann gave me.
workgroups: reordered, updated and linked groups

Hannes is Prof now (not PD)
Enabled more Markdown extensions

More information about the extensions:
https://pythonhosted.org/Markdown/extensions/index.html
Extract title from filename automatically.

And add the needed path for static files.
News: New Design
less space arout page-title
Kral: using bullet points now.

- fixed link by adding missing http://
- removed superfluous "lang: en" and slug.
Links section: Adding MHH and NIFE
Added lenarz.md
adding images from p. erfurt