Trying to make the overlay with tables.

Off by some pixel values
Let's use this overlay style
Long lines of code are good
Added line numbers
Added scroll-padding
Added the ability to load a file from disk.

This is arguably better than a sharp stick in the eye.
preparing to add in line highlights on mouseover
Line two gets highlighted!
Merge remote-tracking branch 'origin/master' into code-demo-exp

Conflicts:
	js/app.js
More JSHint
Mouseover of code looks nice

(in chrome, at least.  IE looks odd)