Add google cloud datastore implementation#136

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amura2406 wants to merge 4 commits intothenativeweb:masterfrom

amura2406:master

Commits on Oct 28, 2018

Commits on Oct 30, 2018

move index.yaml (gcloud datastore) into test folder
amura2406
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Commits on Oct 31, 2018

use Store.use instead of "require"
amura2406
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