[conformal/btcwallet] 8d928c: Update for recent btcec API changes.

[Jimmy Song]

  Branch: refs/heads/master
  Home:   https://github.com/conformal/btcwallet
  Commit: 8d928ce2e1dabaea669c66b5742c35fddcc021a1
      
https://github.com/conformal/btcwallet/commit/8d928ce2e1dabaea669c66b5742c35fddcc021a1
  Author: Jimmy Song <jaej...@gmail.com>
  Date:   2014-10-12 (Sun, 12 Oct 2014)

  Changed paths:
    M keystore/keystore.go
    M keystore/keystore_test.go
    M rpcserver.go

  Log Message:
  -----------
  Update for recent btcec API changes.

This change is introduced so that btcwallet will continue to compile after
issue 6 in btcec is merged.