storage: Streaming operations should return response body as an object if JSON.
fixes #38 datastore.get returns key/prop combined object.
Code reorg to handle responses across the client library.
Use language from Cloud Datastore website for description.
Merge pull request #74 from silvolu/master

TEST(datastore): add regression test for filtering by key.
Add unit tests for response handling.
Merge pull request #81 from pcostell/master

Use language from Cloud Datastore website for description.
Merge pull request #76 from rakyll/callback-stream

storage: Streaming operations should return response body as an object
Merge branch 'master' of https://github.com/GoogleCloudPlatform/gcloud-node
datastore.runQuery returns key/prop combined object.
Merge pull request #75 from stephenplusplus/master

fixes #38 return key/prop combined object.
Merge branch 'master' of https://github.com/GoogleCloudPlatform/gcloud-node
fix(datastore): fix for filter by key regression test.

Broken by API change in #75.