Add filter option

[ppinchuk]

When exporting data, we want to be able to filter based on some criteria. Likely, this could be implemented as a subcommand like

compass-db export [export-OPTIONALS] filter [filter-OPTIONALS])

We want to be able to filter on the following:

• Given a shape (point or maybe some sort of bounding box), export only ordinances with jurisdictions that intersect that
• Given a state name, export only ordinances for that state
• Given a county name, export ordinances only for that county
• Given a time range, export ordinances enacted within that range
• Given a time range, export ordinances scraped by our tool within that range