[conformal/btcchain] a56dfc: Export CalcBlockSubsidy function.

[Dave Collins]

  Branch: refs/heads/master
  Home:   https://github.com/conformal/btcchain
  Commit: a56dfc7ff4395a4d4e795c9aa6726ad595d06b9d
      
https://github.com/conformal/btcchain/commit/a56dfc7ff4395a4d4e795c9aa6726ad595d06b9d
  Author: Dave Collins <da...@conformal.com>
  Date:   2014-02-24 (Mon, 24 Feb 2014)

  Changed paths:
    M validate.go

  Log Message:
  -----------
  Export CalcBlockSubsidy function.