New stylesheets for aggregators

Kind of copied wholesale from TBE but that’s what its all about. Let me know if there are any issues. This applies from the previous post onwards.

I now wrap Rumbling Edge posts in <div class=”rumblingedge”> to make it safer to select on Rumbling Edge classes in RSS aggregator pages. I also added classes for builds on each OS, so people with personal Planets and similar aggregators can hide information about builds for platforms they don’t use.

Sample CSS files for aggregators: make fix/regression lists look like they do on The Rumbling Edge, hide non-Windows builds, hide non-Mac builds, hide non-Linux builds.