Fixes #2922
Putting gun away now properly lowers aim.
Prevents gun from going off if it's not in active hand.
Should fix quite a few of false positives on gun targeting.
Allows mob to click on turfs with empty hand.
Merge branch 'master' of https://github.com/Baystation12/Baystation12
Fixes #2926
Now master alarm in area polls all other alarms and sets area alert level to highest out of them.
So no more green alarms opening lockdowns until they turn red too.
Merge pull request #2928 from comma/master

Couple of fixes