PowerCOM BNT-1000AP HID instant commands

Adds a few vendor-specific HID mappings for PowerCOM.

Instant commands supported on UPS [pcm]:

beeper.disable - Disable the UPS beeper
beeper.enable - Enable the UPS beeper
beeper.toggle - Toggle the UPS beeper
load.off - Turn off the load immediately
load.on - Turn on the load immediately
shutdown.return - Turn off the load and return when power is back
shutdown.stayoff - Turn off the load and remain off
test.battery.start.quick - Start a quick battery test

http://article.gmane.org/gmane.comp.monitoring.nut.devel/6435
Merge branch 'powercom-instant-commands'
Forgotten subdriver version bump