Regression tests?

[df7cb]

Hi,

I can see in Makefile that the logic for running regression tests exists, but the directory test/ is not there. Does that exist elsewhere? Could it be added here, or should I try writing something and submitting a pull request?
I'd be interested in packaging sqlite_fdw for Debian, and having at least some basic smoke test would be nice.
(Also, would you consider creating releases by tagging in Git, so I could track progress better?)

Thanks, Christoph