Fix for bug #72.

Update mesh normals after a boolean operation.
Also updated boolen operation to copy face flag (propagate
face smoothness information).

source/blender/blenkernel/BKE_booleanops.h

@@ -132,7 +132,7 @@ typedef struct {
 	
 		/* assorted tface flags */
 	void *tpage;
-	char flag, transp;
+	char flag, transp, faceflag;
 	short mode, tile;
 } FaceData;