Update to 0.9.7

Changelog:
pdf2djvu (0.9.7) unstable; urgency=low

  * Fix build failure with Poppler ≥ 0.58.
  * Improve the build system:
    + Fix non-portable sed(1) calls in the manpage translations makefile.
    + Use relative paths when building OpenJPEG for Windows (so that absolute
      paths are not included in the binary).
  * Upgrade libraries bundled with the Windows package:
    - Poppler 0.59.

 -- Jakub Wilk <jwilk@jwilk.net>  Mon, 04 Sep 2017 21:15:05 +0200

pdf2djvu (0.9.6) unstable; urgency=low

  * Port the code to C++11.
    Incidentally, this fixes build failure with Poppler ≥ 0.57.
  * Fix GCC 8 warnings about catching polymorphic type by value.
    https://github.com/jwilk/pdf2djvu/issues/122
  * Upgrade libraries bundled with the Windows package:
    - Poppler 0.57;
    - GraphicsMagick 1.3.26;
    - Expat 2.2.3;
    - FreeType 2.8;
    - fontconfig 2.12.4.
  * Windows: build Poppler against OpenJPEG 2.1.2.
  * Improve the test suite.

 -- Jakub Wilk <jwilk@jwilk.net>  Mon, 07 Aug 2017 14:52:02 +0200


(ryoon)