Cloudant query support

Added code to create a simple index with integration tests using Cloudant query API #53 . Before adding more features, wanted to have a quick review of the components. We don't have querying yet. If okay, will add delete/listing of indices, followed by query.
Not saying that this is the case, just sharing.... If you feel that there's a need for verb specific requests, e.g. `PutIndexRequest` that is fine. Rather that than a to generic one.