v0.4.1.
Added full PubSub support for SUBSCRIBE UNSUBSCRIBE and PUBLISH.
On branch dev
modified:   Readme.md
modified:   lib/commands/connection.js
modified:   lib/commands/index.js
modified:   lib/commands/pubsub.js
modified:   lib/commands/server.js
modified:   lib/vapid.js
modified:   package.json