Merge pull request #5 from vidhant/master

Added the background images and the associated table.
Added Navigation and overlay.

Signed-off-by: Ashutosh Dhundhara <ashutoshdhundhara@yahoo.com>
Fix minor issues.

Signed-off-by: Ashutosh Dhundhara <ashutoshdhundhara@yahoo.com>
Added External Links functionality.