- update to version 2.3.1
- drop patches merged upstream:
* magic-optimization.patch
* update-copying.patch
- drop qiv-2.2.4-fix-bashisms.patch:
shebang of qiv-command.example has been changed to /bin/bash
- remove libXinerama-devel from BuildRequires: not needed anymore
- add new build dependencies:
* libjpeg8-devel
* liblcms2-devel
* libtiff-devel
* update-desktop-files
- remove exec bit from contrib scripts to avoid additional dependencies
- install icon and desktop file
- install contrib scripts with the documentation