Walking hub walkthrough

Since nobody using the walking hub showed up for yesterdays lab session, we did'nt go through how to use the walking hub. We've set up some suggested timeslots for a walktrhough. See: https://mattermost.uio.no/ifi-undervisning/pl/gu4dwpkretymzes8o858cz8nhc

Not applicable for those not using the walking hub.