fixing negative kickoff times in multiple rows
dropping old file
fixing negative kickoff times in multiple rows
added play ids relative to each game
fixing previous claim; now testing for invertibility in scripts
fixing plays without offense/defense by checking the opposing team
adding game ids without kickoffs; added DRIVE_ID column and data
finished adding DRIVE_ID column and data; adding small test data
fixing formatting in README
removing test data
emptying __init__, placing cleaning scripts in separate file