Minor Announcements

Head of Staff announcements (ie the ones made via request consoles) are now "Minor Announcements". While head announcements are unchanged, other in-game notifications have been expanded to use their format, including when the Captain joins the game, and early shuttly launch notifications.

They're basically meant to be big and noticable, but not as annoying and spammy as Priority Announcements.

I wanted to include a sound for them, but I've been unable to find one I was satisfied with.
Added a sound.
Changed Captain's arrival announcement type to General
Minor Announcement format expanded to include Alert Level changes and Emergency Declarations
Resolved Conflicts:
	code/defines/procs/priority_announce.dm
Admins changing shuttle time will use minor_announce instead of priority_announce
Merge pull request #4418 from Ikarrus/minorannouncements

Minor Announcements