modified navigation list css

Added top and side margins as well as made it fixed.
Rounded borders etc.

Signed-off-by: Vishnu Suresh <vishnusuresh@git.com>
Changes to add links in HTML

The links and targets for navigation are added.

Signed-off-by: Vishnu Suresh <vishnusuresh@git.com>
modified backgroud and font in css

Signed-off-by: Vishnu Suresh <vishnusuresh@git.com>