Update feature list

plugins/org.polarsys.chess.checkers/META-INF/MANIFEST.MF

 Manifest-Version: 1.0
 Bundle-ManifestVersion: 2
-Bundle-Name: CheckerManager
+Bundle-Name: org.polarsys.chess.checkers
 Bundle-SymbolicName: org.polarsys.chess.checkers;singleton:=true
 Bundle-Version: 1.0.0.qualifier
 Bundle-RequiredExecutionEnvironment: JavaSE-1.8
@@ -30,3 +30,4 @@ Export-Package: org.polarsys.chess.checkers,
  org.polarsys.chess.checkers.core.impl
 Bundle-Activator: org.polarsys.chess.checkers.Activator
 Bundle-ActivationPolicy: lazy
+Bundle-Vendor: Fondazione Bruno Kessler

plugins/org.polarsys.chess.feature/feature.xml

@@ -194,4 +194,11 @@ http://www.eclipse.org/legal/epl-v10.html
          version="0.0.0"
          unpack="false"/>
 
+   <plugin
+         id="org.polarsys.chess.checkers"
+         download-size="0"
+         install-size="0"
+         version="0.0.0"
+         unpack="false"/>
+
 </feature>