Server MOTD added

Also added a new setting - shortname - which needs a better description.
I've based it off ETS2MP's API, which there's the server name which
would be the extended one "[SA] RockyTV's Dev Server | MODS/STUFF", and
there's the shortname, which would be "RockyTV's Test Server".

I added it in a new message because that was the best way I've found to
finally learn how to send messages through the DMP network.
Added client-side /motd command
Bump protocol version for MOTD.
Bump load, pack, and unpack distances.
Attempt to load vessels in the atmosphere
Only enable hooks if the worker is enabled
Fix missing Events.OnCrewBoard.Remove(this.OnCrewBoard) call - Likely fixes vanishing crafts.
Go back to queued logging, add "isFlying" byte into the initial sync messages.
Revert in-atmosphere loading.