3730 & 3731 Add commas and fix HTML on a tag set's page

[Issue 3730] (http://code.google.com/p/otwarchive/issues/detail?id=3730) & [Issue 3731](http://code.google.com/p/otwarchive/issues/detail?id=3731)

Categories, Ratings, and Warnings on tag sets were all lumped together when they should've been separated by commas for easier reading. The <div class="tagset home"> wasn't closed, there was a <div class="clear"><!--clear stats--></div> that didn't belong, and the <dd> that pairs with the Description <dt> wasn't closed in the proper place.

Also adds translation strings and fixes whitespace.