Add links to corresponding sub-page of http://games.kde.org for each game as Emil described on k-g-d.

The only game i left unchanged is ksudoku - it already has ksudoku.sourceforge.net as homepage,
not sure if i should change this - need to ask authors.

Also some games (f.e. kdiamond) don't have page on games.kde.org, but Emil said they'll be there for 4.1, so
i'll added links in advance.

svn path=/trunk/KDE/kdegames/konquest/; revision=798462