Override content-single.php to simplify output

Override the default content-single.php file in the Twenty Eleven theme
to reduce the meta output for tags, categories and the permalink.
Use item() for HTML collection reference

As a safety feature, this change changes to use the correct item()
accessor for the HTML collection returned from getElementsByTagName() as
array-style syntax can fail under older versions of IE.
Match widget fixes

This change includes two changes to the match widgets. First, match
widgets no longer contract and expand. Second, the styles for the match
widgets has been adjusted to increase the size of the W/L and make the
@/vs bold, as well as increasing the spacing above the venue.

This change also includes a tweak to the display for the error page.