Add 'user friendly' datastore API.

service/datastore/types.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
 
 import (
         "fmt"
 )
 
 // ByteString is a short byte slice (up to 1500 bytes) that can be indexed.
 type ByteString []byte
 
 // GeoPoint represents a location as latitude/longitude in degrees.
 //
 // You probably shouldn't use these, but their inclusion here is so that the
-// Datastore can interact (and round-trip) correctly with other datastore API
-// implementations.
+// datastore service can interact (and round-trip) correctly with other
+// datastore API implementations.
 type GeoPoint struct {
         Lat, Lng float64
 }
 
 // Valid returns whether a GeoPoint is within [-90, 90] latitude and [-180,
 // 180] longitude.
 func (g GeoPoint) Valid() bool {
         return -90 <= g.Lat && g.Lat <= 90 && -180 <= g.Lng && g.Lng <= 180
 }
 
@@ skipping 29 matching lines @@
         case Auto:
                 return "Auto"
         case On:
                 return "On"
         case Off:
                 return "Off"
         default:
                 return fmt.Sprintf("UNKNOWN_Toggle(%d)", b)
         }
 }