Get connection state and reconnect

[mehl321]

I sometimes get this message when my connection is closed: WebSocket connection to '[pusher url...]' failed: WebSocket is closed before the connection is established..

It would be nice to have a method called isActive() or isConnected() to know about it and be able to reconnect.

[doowb]

Should this be exposed on the Service or just implemented inside the service to attempt auto reconnects?

[mehl321]

In my app, I would like to track any disconnection and perform some logic if it happens. That why exposing a method would be ideal for me.

[doowb]

@mehl321 sorry for the long delay... does this commit help?