Add video of SciPy'14 with ligthning talk about project.

Made some CSS tweaks to help the whole thing fit vertically in smaller
screens without too much scrolling.

In particular, had to change the footer to relative positioning so it
wouldn't clobber the bottom of the page so easily.
Merge pull request #2 from fperez/lighting-talk

Add video of SciPy'14 with ligthning talk about project.