Initiative/R&D: Investigate WebSockets

[Nashorn]

R&D
Research and propose a solution for client<-->client communications using WebSocket browser api. See:

• https://developer.mozilla.org/en-US/docs/Web/API/WebSockets_API
• https://socket.io/docs/

socket.io is a project that "wraps" the browsers api:

• why?
• benefits over native api
• write simpler api or use socket.io
• check possibilities/restrictions/license model

SERVER:
What is involved in setting up nodejs server side? Simple as installing express? What about simple nodejs server, how will this work when testing locally.