Improve multiUser performance

[AlbertoElias]

WebRTC isn't great for many people interacting simultaneously, but we would like to keep the peer-to-peer aspect of it. There are different ideas we had thought of:

• Work more on channels so people experience these virtual worlds with specific people instead of them being mainly public spaces. This is something important to implement for privacy as well
• Make some users who have a better connection act like servers. Instead of each peer sharing everything with all other peers, most peers signal their information to the server peers, and these servers relay that information to the rest
• Integrate a more centralized server approach into simbol-server to make it easy for the different sites to have a WebSocket server that relays each peers information to the rest