Update _home.scss

Screenshots were misaligned, see screenshot https://www.dropbox.com/s/m4jx6vgn8a6sijp/Screenshot%202014-09-01%2017.34.53.png?dl=0
Merge pull request #2 from kix/patch-1

Update _home.scss
Generate main.css file for 860f775e2d77d4c4309e7a89301dde13711df76a
Fix screenshot images layout problem in Firefox / IE

The old one only worked in Chrome.