Related code:
http://stackoverflow.com/questions/15398237/detect-hardware-headphone-presses-in-mac
Because pressing the remote button and having iTunes open makes me sad.
I am not sure if this is a recent development because I could have swore that it worked before but I've found the same thing happening in the iOS app as well, where when I click the button to paus that it starts playing music.
2021 clean-up: duplicate
