Base - add DNS prefetching for all domains used in site

In particular Disqus comments fetch a shed load of resources all over
the place so prefetch DNS records for thos records.
Base - add MSIE9 Pinned Site tooltip for Mindgames site

If a user pins the site to the Start Menu or the Taskbar mousing
over the pinned item shows this text as a tooltip.
favicon - add and build a favicon.ico
footer - add a footer to all pages
Game summary - markup game details with a microformat schema

More details here: http://schema.org/
Game summary - fix RDF metadata for last updated date

In the SoftwareApplication specification the item property name for
the last updated timestamp must be 'dateModified'.