Make connection failures attempt to reconnect after N seconds.

N is relative to self.reconnectAttempts, N = `30 * self.reconnectAttempts`.

Also added the server tag to connection error messages, now you won't be confused anymore!
Merge pull request #23 from 404d/issue/23.connection-failure-not-reconnecting

In some cases of ping timeout for example, the bot won't reconnect to the server.