[btcsuite/btcrpcclient] 6f3bc8: Add support for the session extension RPC.

[Josh Rickmar]

  Branch: refs/heads/master
  Home:   https://github.com/btcsuite/btcrpcclient
  Commit: 6f3bc8e57cd4a7d8131e511fc7530dd5b4708191
      
https://github.com/btcsuite/btcrpcclient/commit/6f3bc8e57cd4a7d8131e511fc7530dd5b4708191
  Author: Josh Rickmar <jr...@companyzero.com>
  Date:   2015-09-17 (Thu, 17 Sep 2015)

  Changed paths:
    M extensions.go
    M notify.go

  Log Message:
  -----------
  Add support for the session extension RPC.