update dependencies - conform to socket.io 1.1.x and express 4.9.x
Merge branch 'react'

* react:
  update dependencies - conform to socket.io 1.1.x and express 4.9.x
Merge branch 'master' into heroku-edition

* master:
  update dependencies - conform to socket.io 1.1.x and express 4.9.x