[conformal/btcchain] 2300b3: Add checkpoint at block height 267300.

[Dave Collins]

  Branch: refs/heads/master
  Home:   https://github.com/conformal/btcchain
  Commit: 2300b357319ccf3c27029ef90da7eb7f9ff792ba
      
https://github.com/conformal/btcchain/commit/2300b357319ccf3c27029ef90da7eb7f9ff792ba
  Author: Dave Collins <da...@conformal.com>
  Date:   2013-11-12 (Tue, 12 Nov 2013)

  Changed paths:
    M checkpoints.go

  Log Message:
  -----------
  Add checkpoint at block height 267300.