Express app generated with express-generator

Uses Hogan and Sass/Compass

Signed-off-by: Waldemar Figueroa <waldemar@nobox.com>
Added Gulp task runner and some basic tasks

Could not make Livereload work, so just used BrowserSync even if it's a bit overkill.
First round of the app skin. Added major elements.

- App background
- App footer
- Firefox OS logo
- Fox drawing
- Phone

Still figuring how to best position everything to be as scalable between big screens of different sizes as possible.