Changed dependencies.

Details:
  - express 3.1.x to replace connect
  - socket.io 0.9.x for listening for websocket requests if httpd enabled.

Signed-off-by: Diwank Singh <diwank.singh@gmail.com>
Wired express and socket.io in

Signed-off-by: Diwank Singh <diwank.singh@gmail.com>
Updated docs.

Signed-off-by: Diwank Singh <diwank.singh@gmail.com>
Merge pull request #446 from creatorrr/expressjs

Added express and socket.io