Adding color to blocquote links in documentation dotcloud/docker/issues/6377

We still want the inside of the blockquote to be fully colored with only one color... except for links that hev to be a bit different to spot them out.

Docker-DCO-1.1-Signed-off-by: Julien Bordellier <me@julienbordellier.com> (github: jstoja)
Adjust heading styles

Docker-DCO-1.1-Signed-off-by: O.S. Tezer <ostezer@gmail.com> (github: ostezer)