node.js:205
        throw e; // process.nextTick error, or 'error' event on first tick
              ^
Error: Cannot find module 'socket.io-client'
    at Function._resolveFilename (module.js:318:11)
    at Function._load (module.js:263:25)
    at Module.require (module.js:341:17)
    at require (module.js:352:17)
    at Object.<anonymous> (.....directory.....
o.js:12:14)
    at Module._compile (module.js:416:26)
    at Object..js (module.js:434:10)
    at Module.load (module.js:335:31)
    at Function._load (module.js:294:12)
    at Module.require (module.js:341:17)