enable pygments.
change doc.css for navbar. change order of styles.
add css for dropdown menu
Merge branch 'feature/twitter-bootstrap-3.0.0' into develop
change css for footer.
change css for footer.
add css for image on posts.
change css for dropdown menu.
change css for selected item on dropdown menu.
Merge branch 'feature/twitter-bootstrap-3.0.0' into develop