Ditched drop-shadows in top menu bar.  (ugly!)

On failures, users will get nicer looking messages and admins will get email.

Changed display of all date/time data to be UTC.
GPS times display UTC times when cursor hovers over them.

Added info for signing up to list on home page.

RSS title link now points to the gracedb query page.
Maybe not right, but better than the broken link that was there.