Responsive design: optimizing for mobile  As of early last year,
the world hit a landmark; one billion people were surfing the
web from mobile devices. That’s right, one in eight people
worldwide now have a smartphone, Kindle Fire, iOS device, Kindle
Displayschutzfolie or similar gadget from which they can and do
access the internet through wi-fi or a cellular plan. And the
development of wi-fi hotspots like Clear and similar devices
have made it possible for even non-cellular devices to use a
cellular connection for internet access on the go. Estimates are
that some fifteen percent of Black Friday e-commerce sales in
2011 were made from mobile devices. That adds up to millions
(perhaps billions) of dollars in purchases.  This is sending a
pretty clear message to Internet entrepreneurs; you’d better
have a mobile-ready website, or you’re giving up at least 10% of
your potential profits. But to complicate the issue, you can’t
just put your normal website onto a mobile-device screen. Even
the ones that have eno