[conformal/btcjson] 62eb2f: Accept nil string for account name

[Javed Khan]

  Branch: refs/heads/master
  Home:   https://github.com/conformal/btcjson
  Commit: 62eb2f219809162ce674e23bdc789ab896da05f2
      
https://github.com/conformal/btcjson/commit/62eb2f219809162ce674e23bdc789ab896da05f2
  Author: Javed Khan <tuxcan...@gmail.com>
  Date:   2015-01-12 (Mon, 12 Jan 2015)

  Changed paths:
    M jsoncmd.go
    M jsoncmd_test.go

  Log Message:
  -----------
  Accept nil string for account name