Turn the FAA NASR subscription data into a csv of your choosing.

To run:

1. Download the latest NASR subscription here
2. Extract the files
3. Copy APT.txt into the Data directory
4. Adjust the columns if you'd like
5. Run it
6. Output is placed in Data/Output.txt

If the column format changes do the following

1. Add the new apt_rf.txt to the Data directory
2. Pass saveModel: true into PopulateColumnsAsync like so: PopulateColumnsAsync(saveModel: true)
3. Run the program at least through PopulateColumnsAsync, this will read the new column data and save the Models/Airport.cs file.
4. With the new Model, run the program again and hope it works!