Past 72hr Jam Entry Atrium a1a

Removed extra tf_gamerules entity that prevented the clocks from working.

Re-uploading the map because all the downloads hosted on the site have become disassociated with their threads due to a faulty plugin.

Sorry, I forgot that I used some custom materials from Frontline! and Construction. I haven't uploaded the map to the game servers yet, so it's safe to keep it as A1.