Activate Voice Actions from Lock Screen Is there a way to activate Voice Actions from the lock screen?

I've abandoned the iPhone world, and only miss this one feature. On my iPhone I could press and hold my home button to activate Siri. From there, I could run all kinds of voice commands... The way I see it on my lg-nexus-4 is that I have to unlock the phone and swipe up. Then say "google" to activate Voice.
I wanted to do the same thing but the long press feature seems to be locked down by Google. My work around was to install Headset Button Controller and bind three button presses in a row to voice search which works great. There is a trial version but I was happy to pay a few Euro for the feature. 

Incidentally, the app also fixed the headset button not responding sometimes when the screen was locked by enabling Prevent sleep mode while the headset is plugged in. Its in the advanced settings area. 

I am using a Galaxy Nexus on 4.2.2