v0.0.4: Include only rows from specified tables.

To be able to cut out the noise, we allow the user to optionally be able
to include only the rows from certain tables.

v0.0.3

Error handling when table or primary key do not exist.

We now raise exceptions with informative messages, rather than letting
the errors percolate through the code.

SQL-Alchemy has been updated to use the `get_one` method of a session.

v0.0.2

Change the version in config