[btcsuite/btcrpcclient] 0519b8: Add `version` command to JSON-RPC API for API vers...

[Alex]

  Branch: refs/heads/master
  Home:   https://github.com/btcsuite/btcrpcclient
  Commit: 0519b86a9d0b4f9a2609ebe5bc6c9964be4bbf0c
      
https://github.com/btcsuite/btcrpcclient/commit/0519b86a9d0b4f9a2609ebe5bc6c9964be4bbf0c
  Author: Alex <a...@akselrod.org>
  Date:   2016-12-22 (Thu, 22 Dec 2016)

  Changed paths:
    M LICENSE
    M extensions.go

  Log Message:
  -----------
  Add `version` command to JSON-RPC API for API versioning