make license consistent

LICENSE

@@ -1,7 +1,7 @@
 pdf2htmlEX (https://github.com/coolwanglu/pdf2htmlEX)
 Copyright (c) 2012-2014 Lu Wang <coolwanglu@gmail.com> and other contributors
 
-pdf2htmlEX, as a whole package, is licensed under GPLv3.
+pdf2htmlEX, as a whole package, is licensed under GPLv3 (or any later version).
 
 Files in share/ and logo/ are released under relaxed licenses, 
 read the respective `LICENSE` file in the folders for details.

README.md

@@ -59,7 +59,7 @@ Want to help without coding? Thank you!
 
 ### LICENSE
 
-pdf2htmlEX, as a whole package, is licensed under GPLv3.
+pdf2htmlEX, as a whole package, is licensed under GPLv3+.
 Some resource files are released with relaxed licenses, read `LICENSE` for more details.
 
 ### Acknowledgements

debian/copyright

@@ -5,22 +5,7 @@ Source: http://github.com/coolwanglu/pdf2htmlEX
 
 Files: *
 Copyright: 2012 WANG Lu <coolwanglu@gmail.com>
-License: GPL-2 or GPL-3
-
-License: GPL-2
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
- .
- This program 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.  See the
- GNU General Public License for more details.
- .
- You should have received a copy of the GNU General Public License along
- with this program; if not, write to the Free Software Foundation, Inc.,
- 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+License: GPL-3+
 
 License: GPL-3
  This program is free software: you can redistribute it and/or modify