Regression tests for tiger geocoder

[robe]

Now that we are making so many changes to tiger geocoder I fair breaking things. Thus need to start writing up regression tests.

Normalize_address is easy since most of what is needed for normalize can run with just the pre-packaged lookup tables loaded.

Geocode is harder since it needs real data so we might have to setup samples.

Speed is important since any minor change we make can significantly impact speed, and that is even trickier to regress since its so dependent on database setup.

Anyrate we'll just start setting up tests and hand test them as we make changes until we've got a better idea.