Make Lecture2Gether infographic

[Flova]

It would be cool to have an infographic that describes how lecture2gether works on a basic level.

The idea:

• One lecture2gether server with bidirectional arrows to multiple users labeled syncing.
• Arrows from the users to a group of servers that are providing the video data (yt, l2g, mp4).
• The users are visually grouped into 2 groups or so with a lecture2gether URL over them.