[Microkernel-devroom] Speakers can submit additional information

Hi, it turns out that our devroom's speakers can submit some additional information (quoting an email from devroom-managers): * what we need, for each speaker: * links to website, blog, tweetytweets, ... * a photo, not mandatory, but always nice * what we need, for each session: * relevant links to website, blog, git repo, ... Jakub