Release desktop file fix as 2.13.1

Release pqiv 2.13

Relevant changes:

 * Fix `toggle_fullscreen(1/2)` behavior when already fullscreen
 * Add `--font` to adjust info box font, use Pango for rendering (See #221)
 * Prefer x11 over Wayland GDK backend (it overall provides a better experience)
 * Fix Client Side Decorations (CSD), e.g. in Wayland
 * Fix race/crash upon exit (Fixes #227)

bump version to 2.12

Changes since 2.11:
 * Fix external image filters (Fixes #182)
 * Fix support for `best` interpolation quality (Fixes #139)
 * Fix wrap-around in shuffled image view (Fixes #176)
 * Fix max-depth behavior if the argument is a file (Fixes #170)
 * Allow keybinding of special keys with shift modifier
 * Add `--auto-montage-mode` (Fixes #181)
 * Replace GTimeVal with GDateTime for glib 2.62 support
 * Add an sxiv-like marks system

Bump version to pqiv 2.11

Changes from 2.10.4:
 * Added negate (color inversion) mode (bound to `n`, `--negate`)
 * Rebound `a` (hardlink image) to `c-a` by default (See #124)
 * Improved key bindings documentation (See #127)
 * Add `--actions-from-stdin` and let it block until actions are completed
   (See #118/#119)
 * Fix zooming on tiling WMs (See #129)
 * Support ffmpeg 4.0 API
 * Fix cross-compiling with X11 (Debian #913589)
 * Fix resizing in WMs without moveresize support (See #130)
 * Work around GTK bug resulting in crash due to invalid free()
 * Improve autotools compatibility of the configure script (See #135)

pqiv-2.10.4

This is a small bugfix release with a single change to the Makefile: It moves
the -shared flag used to build the backends (in shared mode) to the end of the
command line. This is required to build with some GCC versions.

pqiv-2.10.3

This adds the following fixes upon 2.10.2:

 * Removed possible deadlock in ImageMagick wand backend
 * Fixed --command-9

pqiv-2.10.2

This fixes two small bugs and one which can potentially crash pqiv, though only
when rapidly pressing the space bar in a directory full of PDFs:

* Fix output of `montage_mode_shift_y_rows()` in key bindings
* Update the info text when the background pattern is cycled
* Prevent potential crashes in poppler backend for rapid image movements

pqiv-2.10.1

This fixes processing of dangling symlinks in the file buffer.

pqiv-2.10

This is the release of pqiv 2.10. It adds some small features, most notably
mouse navigation in montage mode, and fixes a bug which could lead to
segmentation faults (due to use-after-free of a mmap'ed file).

Full changelog:
 * Enable cursor auto-hide by default
 * Enable mouse navigation in montage mode
 * Added `toggle_background_pattern()` (bound to `b`) and
   `--background-pattern`.
 * Added support for alternate pqivrc paths, changed recommended location to
   ./.config/pqivrc.
 * Sped up `--low-memory` mode (using native- instead of image-surfaces)
 * Fixed graphical issues with fading mode and quick image transition
 * Fixed support for platforms with `sizeof(time_t) != sizeof(int)`
 * Fixed a race condition in the file buffer map

This is the release of pqiv 2.9.

As usual, as a minor release, pqiv 2.9 comes with some new features. The most
important one for package maintainers is optional webp support through libwebp,
added by Github user @john0312. Note that webp is supported through ImageMagick
7.x as well, provided your distribution already uses this version of
ImageMagick.

For end-users, the most notable change is the new montage mode, introduced by
suggestion of @bearcatsandor and with a lot of debugging help by @noctuid in
bug #82. Montage mode (otherwise known as image grid) shows a grid of thumbnails
instead of single images, allowing for quick navigation between images. Montage
mode supports quick keyboard navigation through "follow mode" (try pressing `g`
in montage mode, which itself can be activated using `m`) and persistence of
thumbnails following the thumbnail managing standard.

Further changes:

 * Added the means to skip over "logical" directories, such as archive files
   (bound to `ctrl+space` and `ctrl+backspace` by default)
 * Improved responsivity by caching pre-scaled copies of images
 * Removed tearing/flickering in WMs without extended frame sync support
 * Fixed support for huge images (>32,767px) in the GdkPixbuf backend
 * Added option --info-box-colors to customize the colors used in the info box
 * It is now possible to view --help even if no display is available
 * Added --version
 * Added an auto scale mode that maintains window size
 * Bound `Control+t` to switch to "maintain scale level" by default
 * Bound `Alt+t` to switch to "maintain window size" by default
 * Added action `move_window()` to explicitly move pqiv's main window around