Scraper changes, and fixed a bug in database.py

- Each scraper is now in it's own package.
- Scrapers use a yaml file to map snowflake system ID to the scraper website's system
- Scrapers use a simpler naming scheme now. Scraper.py is where the actual scraper is. Scrapermap.yml is where the snowflake system ID is mapped to the scraper site's system ids.