[conformal/btcjson] ed76ff: Add BIP0023 block proposal fields.

[Dave Collins]

  Branch: refs/heads/master
  Home:   https://github.com/conformal/btcjson
  Commit: ed76ff2172b7525689275a3db256e82889931323
      
https://github.com/conformal/btcjson/commit/ed76ff2172b7525689275a3db256e82889931323
  Author: Dave Collins <da...@conformal.com>
  Date:   2014-06-27 (Fri, 27 Jun 2014)

  Changed paths:
    M jsoncmd.go
    M jsonresults.go

  Log Message:
  -----------
  Add BIP0023 block proposal fields.

This commit adds the optional block proposal fields defined by BIP0023 to
the GetBlockTemplateResult and TemplateRequest types.

ok @jcvernaleo