Uses a randomized weighted majority algorithm with experts' advice to give weekly picks on who will win NFL games
To use email function, must supply own email and password (password is set as the environment variable NFLPASS)
Expert picks from here http://espn.go.com/nfl/picks
538.py uses 538's probabilities to choose the winners. (http://projects.fivethirtyeight.com/2016-nfl-predictions/)