[Chart] convert it to a screen saver
|Reported by:||diver||Owned by:||jackburton|
|Has a Patch:||no||Platform:||All|
Since Chart is a demo app it is going to be moved (together with other demos) to an optional package someday. But we can still have it in a base distro in the form of screen saver. The other candidate is Haiku3d app.