Modified melted-node.js to return error when cannot connect

Signed-off-by: Juan Martin Runge <jmrunge@gmail.com>
Modified test to test new functionality of sending error when melted is down

Signed-off-by: Juan Martin Runge <jmrunge@gmail.com>
Incrementing version to publish to npm

Signed-off-by: Juan Martin Runge <jmrunge@gmail.com>