[btcsuite/btcrpcclient] 7cb04a: Update example code.

[John C. Vernaleo]

  Branch: refs/heads/master
  Home:   https://github.com/btcsuite/btcrpcclient
  Commit: 7cb04ae6db6d10d1716b575485b4802423746c9f
      
https://github.com/btcsuite/btcrpcclient/commit/7cb04ae6db6d10d1716b575485b4802423746c9f
  Author: John C. Vernaleo <j...@netpurgatory.com>
  Date:   2015-06-18 (Thu, 18 Jun 2015)

  Changed paths:
    M examples/btcdwebsockets/main.go

  Log Message:
  -----------
  Update example code.

Example code used old api for
OnBlockConnected and OnBlockDisconnected