Use the following commands to load default data into appropriate models.
python manage.py loaddata usaspending_api/references/fixtures/2016_09_12_data.json
python manage.py loaddata usaspending_api/references/fixtures/agencies.json
python manage.py loaddata usaspending_api/references/fixtures/country_codes.json
python manage.py loadcontracts usaspending_api/data/usaspending_treasury_contracts.csv