Started working on the second slide, challenge2

Running into some problems getting the logo accessible and mobile-optimized
Slides 1 & 2 are up and running, albeit inelegantly.

The mobile versions and jQuery transition between slides need polishing.
Still figuring out the best way to deal with the iframes and closing links for the modal.
Just some style edits
Merge pull request #1 from katielmeyer/front-end

Front end