[conformal/btcchain] 958ea3: Export CheckProofOfWork function.

[Dave Collins]

  Branch: refs/heads/master
  Home:   https://github.com/conformal/btcchain
  Commit: 958ea38fdd8aca1b7ad9b8fe36bb7edc1259171f
      
https://github.com/conformal/btcchain/commit/958ea38fdd8aca1b7ad9b8fe36bb7edc1259171f
  Author: Dave Collins <da...@conformal.com>
  Date:   2014-03-28 (Fri, 28 Mar 2014)

  Changed paths:
    M validate.go

  Log Message:
  -----------
  Export CheckProofOfWork function.