make door signallers not useless

[Rhydic]

i want to be able to attach a signaller to a door and tell people not to interrupt me or the signaller will go off when they open the door and explode everything

hiding proximity signallers in a bush is freakin lame, i want it to be door-activated so nobody can see it coming

[Weavel]

You should be able to just insta-slap a signalling device on a door, maybe it can be seen via door examination

[mozi]

i have not toyed with the new mechanics' stuff at all, but is it possible to use them to translate the Packet Transmission the doors sends -> radio transmission?