Update dependencies

Update socket.io to 1.2.1
Update mongodb-client to 2.0.9
Update async to 0.9.0
Update fstream to 1.0.3
Update fstream-ignore to 1.0.2
Update Q to 1.1.2 (2.x is considered experimental)

This also includes my previous fixes and change, so it should be handled manually by maintainers.

All tests seem to pass.