Patch to add ability to discard calls...breaks calls

[MungFuSensei]

Ok, I think I misunderstood a bit how this patch works, but it's still a problem. It actually puts the pickup and discard options in the notifications menu (inefficient, but whatever). The issue is that the call initiates the ring hook, and discarding just hangs up without ever invoking the pickup hook (which would cancel out the ring hook). And again, it's messing with the main pickup call selection that shows up in the menu normally. 

So I don't think this one is ready for 1.3.