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

http://code.google.com/p/otwarchive/issues/detail?id=3730 and 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 and capitalizes labels of types of allowed nominations.
There are some massively misaligned lines (due to tabs?) here. The pull request looks good otherwise, so it can go in, depending on how strict we're willing to be about killing tabs with fire. >.>