Richfaces showcase would be better off in the WFK demo.zip. That was actually where I went looking first and was going to complain that it was missing :-)
I have removed richfaces-root-parent from showcase pom and instead of parent hierarchy there is import of richfaces BOM file in dependency management.
Verified in WFK 2.0.0.ER3.
Verified in WFK 2.0.0.ER3 (a.k.a. 2.0.0.Beta1).