Part 1:  figure out who wins
Returns: 0 for user, 1 for computer, 2 for tie
remember: rock = 0, paper = 1, scissors = 2

To figure this out:
	1 beats 0
	2 beats 1
	0 beats 2

def whowins(user, comp):
	if user == comp:
		win = 2
	elif (user, comp) == (1, 0) or (user, comp) == (2, 1) or (user, comp) == (0, 2):
		win = 0
	else:
		win = 1
	return win