Please add my solution to HTML/CSS exercise ( resubnitted per request - Ticket # 692 )

Thanks Eric - here is the resubmission of the PR...

Erik Trautman <notifications@github.com>

Can't seem to merge this, could you resubmit the PR?
Merge pull request #711 from rickstewart/patch-1

Please add my solution to HTML/CSS exercise ( resubnitted per request - ...