Split off serialization and key functions to their own packages.

service/datastore/serialize/invertible.go

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-package datastore
+package serialize
 
 import (
         "bytes"
 )
 
 // Buffer is the interface which corresponds to the subset of *bytes.Buffer
 // that this package requires.
 type Buffer interface {
         String() string
         Grow(int)
@@ skipping 90 matching lines @@
         ret, err := ib.Buffer.ReadByte()
         if ib.invert {
                 ret = ret ^ 0xFF
         }
         return ret, err
 }
 
 func (ib *invertibleBuffer) Invert() {
         ib.invert = !ib.invert
 }