Address some lintian warnings

dist/debian/changelog

-stimfit (0.14.9-0trusty1) trusty; urgency=low
+stimfit (0.14.9-1) experimental; urgency=low
 
   * Fix several bugs during abf2 (pClamp10) file reading
   * Fix several issues during event detection

dist/debian/copyright

@@ -9,16 +9,12 @@ License: GPL-2+
 
 Files: src/libstfio/abf/axon/*
 Copyright: 1993-2000, Axon Instruments <info@moldev.com>
-License:
- Permission is granted to freely to use, modify and copy 
- the code in this file.
+License: axon1
 
 Files: src/libstfio/abf/axon2/*
 Copyright: 1993-2005, Molecular Devices <info@moldev.com>
            1993-2002, Axon Instruments <info@moldev.com>
-License:
- Permission is granted to freely to use, modify and copy 
- the code in this file.
+License: axon2
 
 Files: src/libstfnum/levmar/*
 Copyright: 2004, Manolis Lourakis <lourakis@ics.forth.gr>
@@ -32,6 +28,14 @@ Files: src/test/gtest/*
 Copyright: 2008, Google Inc <wan@google.com>
 License: BSD-new
 
+License: axon1
+ Permission is granted to freely to use, modify and copy 
+ the code in this file.
+
+License: axon2
+ Permission is granted to freely to use, modify and copy 
+ the code in this file.
+
 License: GPL-2+
  This program is free software; you can redistribute it
  and/or modify it under the terms of the GNU General Public