lib/pq — pull request #163 by paulhammond (2013-10-10 14:28:47+00:00)
Title: Re-export Open

In #161 I assumed that nobody was calling `pq.Open` directly. I was wrong, as @fd explained in a [comment](https://github.com/lib/pq/pull/161#commitcomment-4297782) on that pull request.

This pull request fixes that problem.