Reconcile style accross all source files.

- All glabels code is in "glabels" top-level namespace.
- Other assorted cleanup.

glabels/Paper.cpp

@@ -31,6 +31,7 @@ namespace glabels
 		      const QString&  pwgSize )
 		: mId(id), mName(name), mWidth(width), mHeight(height), mPwgSize(pwgSize)
 	{
+		// empty
 	}