bugfix: when user was kicked before mod onUserConnect
I found error:
Code (text):
12:53 PM: ERROR: news: A .NET exception was thrown trying to call static
function SendClientCommand on ConsoleNetworker!
12:53 PM: ERROR: news: invalid arguments to method call (@)
12:53 PM: ERROR: news: nil

And after that server was restarted.
This happened if user got kicked before onUserConnect event was
executed.
I hope this is now fixed.

Advanced missions:
Also added initial mission and kill tracking (you will notice
advanced_mission_progress.txt file at data directory). Sorry, had to fix
a possible blocker bug before I was able to completely implement
progressive missions. But do not worry, that feature is on the way!