further debugging on pop()
Merge branch 'master' of https://github.com/cindyliu/e250-final-project
Merge branch 'master' of https://github.com/cindyliu/e250-final-project
Prioqueue implemented, with 2 major bugs
Merge branch 'master' of https://github.com/cindyliu/e250-final-project

Conflicts:
	options_for_destination_urls.txt
	output_for_debugging.txt