Pair Programming with new partner

1. encode - rot-3
		bonus 1: with wrap around
		bonus 2: ignore spaces and punctuation

hints
ord(letter) -> int
chr(int) -> character
ASCII chart
in operator could be helpful, ex:	letter in "aeiou"
plenty of string module functions
plenty of string class methods

2. decode(encode("Now is the time to travel!"))

3. pricePerGallonInUSDollars(euroPricePerLiter)
    approximate facts to use:
        1 US gallon = 3.78541178 liters
	1 euro = $1.128215