BigQuery

## wip.

### Docs: https://stephenplusplus.github.io/gcloud-node/#/docs/master/bigquery

Carrying on from #262. Just opening this so anyone interested can follow along.

Your system makes sense. :) I'm just wondering why sometimes it changed back and forth. Doesn't really matter to me. I find using `that = this` can sometimes eliminate stupid bugs introduced when you forget to bind, but maybe that's just me.