Qrcode for #593

i've put the ignore list to queries like 'qr code reader' etc, let me know if that is enough or we ignore anything what follows these terms. Also i think we should move this from forever alone, to the goodies repo? :smiley: 
@killerfish awesome! Please add a test or two to verify this works (helps us ensure that the changes work and helps others know what should/shouldn't pass if they update the triggers later)