Updated markup to reflect new CSS

* Removed google-code-prettify JS and CSS. Will return it later.
* Updated HTML to reflect new CSS.
* Added two real-world posts added from [Real Men Wear Beards](http://www.bhalash.com).
Lots of CSS work

* Narrowed content column.
* Added post title.
* Fixed <code> font-size.
* Fixed margin-bottom for all article elements.
* Shrunk header icon and added Twitter link.
Added social media icons