Fix last column header centering on recent games table.

Had to increase last column to 100% for it allow text to be centered. Strangeness is due to a Foundation setting. 

It has to do with this (from http://foundation.zurb.com/docs/v/3.2.5/grid.php):

Note: In order to work around browsers' different rounding behaviours, Foundation will float the last column in a row to the right so the edge aligns. If your row doesn't have a count that adds up to 12 columns, you can tag the last column with class="end" in order to override that behaviour.

This won't work by default in IE8 since it doesn't support :after but you can simply add a new class to override this if you run into this problem.