Add Sounds to Announcements

[Nnystyxx]

Announcements used to be way more special since they would usually show up only when an admin created one. More and more game created announcements being added on kind of ruined the magic.

Also, seeing them all the time conditions us to not really pay attention to them. I think adding a sound would initially help but eventually that would get conditioned out of our minds as well. A random sound could be used each time but that would probably get really annoying.

I also think that having them visually distinguished from other types of announcements would help, since aren't they formatted the same way as various automatic announcements?