Merge pull request #1 from ZomgPonies/master

Tring to merge downstream
Altered disarm knockdown

now only occurs with a 30% chance if you already have an aggressive grab
(or better) on the target.

No more disarm > stun baton.
T-Ray scanner var improvement

Allows tray scanner range and pulse duration to be controlled by vars.
Added three upgraded tray scanners, with increased range, increased
pulse duration, and both of these features.
Adds a sound when nations mode is announced

Not tested because I can't force nations without server pop.
Merge pull request #388 from Bone-White/master

Altered disarm knockdown …