Comprehensive query and read results sample

[scotthart]

Write a sample showing

1. Use the insert+poll overload of InsertJob to start a query expecting a lot of data returned
2. use .then on the future returned from step 1 to invoke a callback to read the results of the finished query
3. the callback should use multiple threads to read the query results in parallel, each thread reading from its own ReadStream

[AnantShukla-Git-Hub]

Hi, I’d like to work on this issue.
I’ll start by drafting a sample demonstrating the insert+poll query flow and reading results using futures and callbacks.
Please let me know if that sounds good.