Incorporate QR-code into poster

Maybe we should have the [QR code](https://github.com/no2bio/mk-personal/blob/gh-pages/img/qrcode-dropthepilot.png) as part of the [poster](https://github.com/no2bio/mk-personal/blob/gh-pages/img/poster.jpg) (e.g. you see the poster out of context [without link. maybe even printed], you can scan with phone).
