datastore: Arrayize input field names.
Merge pull request #23 from silvolu/master

Fix pagination for queries with offset.
Subscriptions shouldn't require a topic to be inited.
More docs for subscriptions.
Adding User-Agent to the requests.
Publish 0.0.4.
Fixed 'value' for property filters.

It should not be enclosed in a 'properties' key e.g. propertyFilter:{property:{...}, operator: ..., properties:{value: {...}}