Display strapline explaining nature of Reasonator

Issue #41 new
Andy Mabbett
created an issue

On pages - for example https://tools.wmflabs.org/reasonator/?q=Q504 - it would be sensible to have a strapline, below the Reasonator logo but above the H1 ("Émile Zola (Q504)") line, saying something like "Displaying public domain data from Wikidata", so that the site's nature is apparent to first-time visitors.