updated gauge to version 6
Merge branch 'master' into update-gauge-version
print rank as a list of list
updated news
deprecicated plot_probability_vs_rank plot
Merge pull request #41 from steinwurf/improve-faq

restructered the faq and merged the glossary into it
Merge pull request #42 from steinwurf/update-gauge-version

Update gauge version
Merge branch 'master' into change-benchmark-plotting-scripts