jme3-vr: deprecate CenterQuad in favor of the new jme3-core version

jme3-vr/src/main/java/com/jme3/scene/CenterQuad.java

@@ -44,7 +44,9 @@ import com.jme3.scene.VertexBuffer.Type;
  * (0,0,0) at the rectangle's center instead of in a corner.
  *
  * @author Kirill Vainer
+ * @deprecated use com.jme3.scene.shape.CenterQuad
  */
+@Deprecated
 public class CenterQuad extends Mesh {
 
     public static CenterQuad UnitQuad = new CenterQuad(0.5f, 0.5f);

jme3-vr/src/main/java/com/jme3/util/VRGuiManager.java

@@ -12,9 +12,9 @@ import com.jme3.renderer.Camera;
 import com.jme3.renderer.ViewPort;
 import com.jme3.renderer.queue.RenderQueue.Bucket;
 import com.jme3.scene.Spatial;
-import com.jme3.scene.CenterQuad;
 import com.jme3.scene.Geometry;
 import com.jme3.scene.Node;
+import com.jme3.scene.shape.CenterQuad;
 import com.jme3.system.AppSettings;
 import com.jme3.texture.FrameBuffer;
 import com.jme3.texture.Image.Format;