[conformal/btcwallet] 437b4c: Add missing license to top of source file.

[Josh Rickmar]

  Branch: refs/heads/master
  Home:   https://github.com/conformal/btcwallet
  Commit: 437b4cbdbea6e1f965934ee75a109a9a974154c6
      
https://github.com/conformal/btcwallet/commit/437b4cbdbea6e1f965934ee75a109a9a974154c6
  Author: Josh Rickmar <jr...@conformal.com>
  Date:   2014-05-05 (Mon, 05 May 2014)

  Changed paths:
    M tx/serialization.go

  Log Message:
  -----------
  Add missing license to top of source file.