update socket.io lib, make NodeJS (6.x or 7.x) compatible#538

NikolaySuslov wants to merge 2 commits intovirtual-world-framework:developmentvirtual-world-framework/vwf:developmentfrom

NikolaySuslov:nodejs.7.x-socketio.1.xNikolaySuslov/vwf:nodejs.7.x-socketio.1.xCopy head branch name to clipboard