Added baffle option and corrected default setting

When faceZones are present one has to decide whether to have zone faces
only on the edge of cellZones or also freestanding.
The setting for minMedialAxisAngle was corrected since the calculation
has also been corrected.

tutorials/incompressible/simpleFoam/motorBike/system/snappyHexMeshDict

@@ -145,6 +145,12 @@ castellatedMeshControls
     // NOTE: This point should never be on a face, always inside a cell, even
     // after refinement.
     locationInMesh (3 3 0.43);
+
+
+    // Whether any faceZones (as specified in the refinementSurfaces)
+    // are only on the boundary of corresponding cellZones or also allow
+    // free-standing zone faces. Not used if there are no faceZones.
+    allowFreeStandingZoneFaces true;
 }
 
 
@@ -500,7 +506,9 @@ addLayersControls
     maxThicknessToMedialRatio 0.3;
 
     // Angle used to pick up medial axis points
-    minMedianAxisAngle 130;
+    // Note: changed(corrected) w.r.t 16x! 90 degrees corresponds to 130 in 16x.
+    minMedianAxisAngle 90;
+
 
     // Create buffer region for new layer terminations
     nBufferCellsNoExtrude 0;