Responder ignores requests that don't include a type property.
Responder checks for requester's namespace before connecting to it.

Previously, it checked the namespace on every message.
All components have "close" method to close the UDP socket.
Introduces Sockend component.

Sockend is the glue for carrying all the possibilities of cote to the next level with WebSockets over socket.io. Sockend makes Responders and Publishers available to the front-end and adhere to socket.io namespaces. It's the magic for distributed web apps.