Card sensor module

InitializeCardSensor: takes no arguments, returns nothing
	Initialize the last left state, last right state, last left time, last right time

SetLEDCalibration: takes which side and card we are reading, returns nothing
	switch: input
		1:
			left, no card is our current analog count
		2: 
			left, green card is our current analog count
		3: 
			left, blue card is our current analog count
		4: 
			left, red card is our current analog count
		5: 
			right, no card is our current analog count
		6: 
			right, green card is our current analog count
		7: 
			right, blue card is our current analog count
		8: 
			right, red card is our current analog count


AnalogToLeftCardState: takes analog count, returns left card state
	local variable: current card state
	if analog count is no card interval, current card state is no card
	else if analog count is red card interval, current card state is red card
	else if analog count is green card interval, current card state is green card
	else if analog count is blue card interval, current card state is blue card
	return current card state

AnalogToRightCardState: takes analog count, returns right card state
	local variable: current card state
	if analog count is no card interval, current card state is no card
	else if analog count is red card interval, current card state is red card
	else if analog count is green card interval, current card state is green card
	else if analog count is blue card interval, current card state is blue card
	return current card state
	
CheckLeftCardState: takes no arguments, returns current left card state	
	if left card state has changed
		if card insert interval has expired
			update current left card state
	return current left card state
	
CheckRightCardState: takes no arguments, returns current right card state	
	if right card state has changed
		if card insert interval has expired
			update current right card state
	return current right card state