Add CSV as an output format.

[abrie]

This PR adds CSV output as an option to the scraper. CSV is well suited for importing into a databases.

When running the scraper, specify the output format using the '--output' argument:

python dekalb_scraper.py --output {json,csv}

Here is an example that populate the 'cases' table in an sqlite3 database:

python dekalb_scraper.py --output csv | sqlite3 database.sqlite3 ".import --csv /dev/stdin cases"

[bbrewington]

Could you check to see if the fields shown in issue https://github.com/codeforatlanta/georgia-courtbot/issues/5 are captured?

I noticed we're grabbing CASE_ID but not CASE_NUMBER. the latter is important b/c that's what someone is going to input in SMS / web form sign up

Thought JUDICIAL_OFFICER would be useful since we're using that for (pagination?) --> in case we need to re-run a chunk of requests at some point

[bbrewington]

Ran a test locally outputting to CSV, and it worked great:

python3 dekalb_scraper.py --output csv > dekalb_scrape_202201170827.csv

^ uploaded that file to Google Sheets...will share link in Slack

[bbrewington]

going to handle above extra fields request in a separate PR