[btcsuite/btcchain] 3951e7: Update btcchain import paths to new location.

[Dave Collins]

  Branch: refs/heads/master
  Home:   https://github.com/btcsuite/btcchain
  Commit: 3951e75a3fb7a60f0d3d52a0f7a6d3d7d93e4c28
      
https://github.com/btcsuite/btcchain/commit/3951e75a3fb7a60f0d3d52a0f7a6d3d7d93e4c28
  Author: Dave Collins <da...@conformal.com>
  Date:   2015-01-16 (Fri, 16 Jan 2015)

  Changed paths:
    M README.md
    M chain_test.go
    M common_test.go
    M difficulty_test.go
    M error_test.go
    M example_test.go
    M mediantime_test.go
    M merkle_test.go
    M reorganization_test.go
    M scriptval_test.go
    M timesorter_test.go
    M validate_test.go

  Log Message:
  -----------
  Update btcchain import paths to new location.