message: updated data loading
diff: @@ -21,9 +21,26 @@ Download the emissions factors in flat file for automatic processing format from
  Load the data with the `dataLoader` script:
  ```
  -npm run dataLoader load_emissions_factors conversion-factors-2021-flat-file-automatic-processing.xls
  +npm run dataLoader load_emissions_factors conversion-factors-2021-flat-file-automatic-processing.xls "Factors by Category" -- --format conversion-factors-uk
  ```
  +Download the [U.S. Environmental Protection Agency eGRID data](https://www.epa.gov/egrid) and . Then load them with:
  +```
  +npm run dataLoader load_emissions_factors egrid2019_data.xlsx NRL19 -- --format egrid_data --source https://www.epa.gov/sites/production/files/2021-02/egrid2019_data.xlsx
  +npm run dataLoader load_emissions_factors egrid2019_data.xlsx ST19 -- --format egrid_data --source https://www.epa.gov/sites/production/files/2021-02/egrid2019_data.xlsx
  +npm run dataLoader load_emissions_factors egrid2019_data.xlsx US19 -- --format egrid_data --source https://www.epa.gov/sites/production/files/2021-02/egrid2019_data.xlsx
  +```
  +
  +Source is an optional tag to record where you downloaded the data from.
  +
  +For 2020 data, you will need the 2020 spreadsheet and change the sheets to `NRL20`, `ST20`, and `US20`.
  +
  +The [U.S. Energy Information Administration's Utility Identifiers](https://www.eia.gov/electricity/data/eia861) can be downloaded, and then the Utility_Data spreadsheet contains the utility identifiers, which can be loaded with
  +```
  +npm run dataLoader load_utility_identifiers Utility_Data_2019.xlsx
  +```
  +
  +
  ### Other Seed Data
  Load the rest of the seed data:
  