example usage:
ensure ids.txt includes the list of all GWJ jam_id values. (I got this list by viewing source for each GWJ results page the ctrl+f for jam_id)
to get list of ALL contributors, then sort by number of times they entered a GWJ jam, run:
./batch_wget_gwj.sh
creates new files: names.txt and unique_names.txt (files deleted and rewritten after each run)
to limit the lists to only the winners (assumed to be the first result in each json file) just add any string:
./batch_wget_gwj.sh winners
creates new files: winners.txt and unique_winners.txt
currently the script doesn't delete the json files each run and always pulls them again.