Add SQL schema

We’re ditching JSON and migrating to a more robust, SQL-based system.
'db_init.sql' is a draft schema.
Schema: Move meta columns to end of table

Reference: <1265B556-930F-42A1-82A1-B8A619DF13D1@galois.com>
setup.py: Stop distributing run.conf.{1,2}

The 'example/run.conf.1' and 'example/run.conf.2' files were formerly
used in documentation, but they no longer exist in the repository.
However, 'setup.py' would still try to distribute them, so various
Distutils operations would fail.