Update icon name to avoid CustomCSS conflict
fix bug 917488 - Update menu for beta launch
Update MDN homepage for beta launch
Merge pull request #1436 from darkwing/signin-icon

Update icon name to avoid CustomCSS conflict
Merge pull request #1437 from darkwing/initial-menu

fix bug 917488 - Update menu for beta launch
Merge pull request #1439 from darkwing/beta-launch-homepage

Update MDN homepage for beta launch