Added register function (untested!)
Merge branch 'master' of https://github.com/stuycs-softdev/proj1-6
Revise utils functions; add app Routes.

Add:
	app.py
		-add "/profiles" and "/posts" routes, to explicitly return all
		profiles/posts.
		-add "login" route, with necessary utils.py calls.

Ref:
	utils.py
		-remove default arguments from post(post = None) and
		profile(username = None), and create specific functions
		posts() and profiles() to return ALL users/profiles.
Merge branch 'master' of https://github.com/stuycs-softdev/proj1-6