Update bootstrap.css

Update to Bootstrap v3.0.2
Info on http://blog.getbootstrap.com/
Update header.php

Update the HTML5 support for IE8 and IE9.
Update bootstrap.min.js

Update the Bootstrap v3.0.2
Info on the http://blog.getbootstrap.com/
Merge pull request #47 from XxCoolGamesxX/master

Update bootstrap and HTML5 support for the IE8 and IE9.