Fix cleanup issue
Merge branch 'master' of github.com:daiweilu/inst737-milestone1

Conflicts:
	summary_of_517101437713932289.csv
	summary_of_517101546111533056.csv
	summary_of_517101561269723137.csv
	summary_of_517101563438178305.csv
	summary_of_517101577631694848.csv
	summary_of_517101582534852608.csv