Cleans up markup in big.html

* Removes wrapper divs around content
* Moves column header info into thead element
Fix improper syntax for css and html

* Close elements that aren't closed as a result of :g abuse.
* Fix broken css class

Filesize is down to 8.7mb from 13mb initially. Definitely better
scroll performance already.
Removes tons of the markups. Files is not ~6.6mb and renders to the page in...
~ 2.62 seconds as opposed to 5.6 seconds for the original 13mb file.