Improve the talk schedule format

[danicat]

We've organized the talks in the chronological order according to the official schedule and included the information on the timeslot, speaker name, talk slide deck and video (TBD). The default reference for the link on the speaker's name is his/her github account, but in many cases it's not the most representative page for the speaker.

This issue is about how to improve this format so it provides more meaningful information about the speakers and the talks without "polluting" too much the grid. Should we keep linking the Github for everybody? Should we use personal pages, twitter or Linkedin instead?

The level of information about the other things are ok? Should we change the output grid somehow?

[vdemario]

Some of the versions we've had so far for reference:

• github only on the speaker's name with no finish time
• github only on the speaker's name with finish time
• personal website on the name + icons for github and twitter