QT5 -- Add Qwt 6.1-multiaxes

qwt/README

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+
+The Qwt Widget Library
+----------------------
+
+      Qwt is an extension to the libraries of the Qt Project.  
+
+      The Qwt library contains widgets and components which are 
+      primarily useful for technical and scientifical purposes.
+      It includes a 2-D plotting widget, different kinds of sliders, 
+      and much more.
+
+      Qwt is hosted at http://qwt.sf.net
+
+Installation
+------------
+      
+      Read INSTALL how to build and install Qwt.
+
+Copyright
+---------
+
+    Qwt Widget Library 
+    Copyright (C) 1997   Josef Wilgen
+    Copyright (C) 2002   Uwe Rathmann
+
+    Qwt is published under the Qwt License, Version 1.0.
+    You should have received a copy of this licence in the file
+    COPYING.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  
+
+