Changes for open source landing page

add logos, redesign look and feel, in time for OSCON conference next
week
What value do the following IE classes add? The stats we're collecting on external GitHub show that IE-11 has 3.55% of the traffic and the rest of the IEs are each less than 1% (IE-7 barely registers at 0.07%). Are these classes being used elsewhere in this pull?

That said, it also looks like IE may get two `html` tags in this implementation (were you shooting for http://www.paulirish.com/2008/conditional-stylesheets-vs-css-hacks-answer-neither/#20120117 ?).