[conformal/btcwallet] 555559: Add doc.go with txstore overview and example code.

[Josh Rickmar]

  Branch: refs/heads/master
  Home:   https://github.com/conformal/btcwallet
  Commit: 5555595c7b1a7b1e65b45cbf7ee57dd93eb81801
      
https://github.com/conformal/btcwallet/commit/5555595c7b1a7b1e65b45cbf7ee57dd93eb81801
  Author: Josh Rickmar <jr...@conformal.com>
  Date:   2014-05-08 (Thu, 08 May 2014)

  Changed paths:
    A tx/doc.go

  Log Message:
  -----------
  Add doc.go with txstore overview and example code.