This patch makes planet.kde.org more discoverable by putting a
reference to it at the end of the "News" section of index.php.
The blog posts should be more discoverable because they generally have
a high quality. This should increase engagement of users with the
community and hopefully lead to more contributors.
This reference should also be visible if the "News" feed is not
available so the "News" section containing the reference is moved
outside the "if (defined("FRONTPAGE_LIVE_FEED"))"-node.