Added Montserrat font and updated the home and game-picking screens

Notes:
- I had to modify the storyboard, but this also means that my FB sdk modification got checked in :(. That will probably break yours. So re-checkin yours?
- I updated the fonts on the login-with-facebook screen, but this appears to be /different/ from the "Wavelength" "a hopefully awesome word game" screen (in which the tag line is at the very bottom). I don't know where this page gets generated?
- For adding fonts, I followed this: http://codewithchris.com/common-mistakes-with-adding-custom-fonts-to-your-ios-app/
- Notably, I had to add that the font gets shipped with the app -- this will be a good test on your machine since you shouldn't have the font installed by default...
- Fonts got added to Resources/Fonts (created the two new directories)