Add migration create_companies
Rename business -> categories. Add column owner and status
Add doc for database setup
Add a step to run postgresql automatically
Resort Database Setup
create/drop extension postgis in migrations
Don't save companies without company name
More descriptions on columns. Drop table when rollback.
Let the raw data importer align the new schema.

- Categories should be text[]
More precise description on table companies

- Add unique constraint and index on taxid
- Allow NULL value for most columns
Convert raw data to Hash and inject it to DB in one script
Sequel.extension :pg_array in the main app
Fix autocomplete url broken in 6785694