Started transition to SQLAlchemy.
SQLAlchemy works adding countries to the DB.
Finish transition of table insertions to SQLAlchemy model classes.
Reintroduced pragma user_version to the SQLA DB.
Turned on foreign key enforcement in SQLite back on. Made --start much more useful by parsing out the number of the trial from the file name.
Add the --force command to skip user_version check. Add back SQLite to the DBManager for querying with raw SQL. Set the user_version pragma via SQLA on creation.
Removed db_init.sql, which was replaced by the model.py file. Updated the model to use dates. Modified the SQL to handle those dates ("IS NULL" not "= 0"). Fixed a bug in insertSQLIntoJSON which caused a crash if the id in the SQL wasn't in the JSON file.