Update README

README

-GENERAL NOTE:
-
-http://games.kde.org/

README.md

+# KFourInLine
+
+KFourInLine is a board game for two players based on the Connect-Four game. The
+players try to build up a row of four pieces using different strategies.
+
+## Screenshot
+
+![Playing KFourInLine](https://cdn.kde.org/screenshots/kfourinline/kfourinline.png)
+
+## License
+
+KFourInLine is licensed under the GPL-2.0-or-later license.
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