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: 
Write as `html_output(...)` instead of `html_output (...)`. Having a space between the parenthesis and the function name looks weird :P