It looks to me like this is also worthy of ignoring, since it's
autogenerated at make time.

Warning generated on MacOS, reported in issue #350.

Related to PR #346.

Two colors are more than enough!

Also makes the color names in config.def.h constant again.

The file names are separated with newlines in the primary and with spaces in
the clipboard.

Fixes issue #331

Putting image info in the title predates the info bar; it no longer seems
necessary.

Fixes issue #318.

Use uppercase for externally defined macros and lowercase for macros defined in
the makefile.

Also simplify generation of version.h.

Since d8114e8 the file name is used for caching as-is without adding
.jpg at the end, but sxiv -c still expected old format causing it to
remove all fresh thumbnails.

This also sets *markidx* when using the right mouse button in thumbnail mode.

*Shift-m* feels much more natural for *mark_range* and *Ctrl-u* is decent
enough for *unmark_all*.

Sets the marked state of all images ranging from the latest marked/unmarked
image to the current image, to the state of that latest toggled image.

VERSION string between releases is last release suffixed with '+'.
Additionally, use output of git-describe instead of VERSION string, if it is
not empty.

Fixes issue #308.

Related to issue #303

Before that zoomdiff was a merely heuristic.

Related to issue #303

Fixes issue #302

When sxiv is built with AUTORELOAD=nop if something is feed via stdin it
will start to infinitely call select() leading to a 100% CPU usage.

Thanks to @sdx23 for helping in analyzing that problem!

Fixes issue #297.

Non-fitting text is truncated by simply cutting it off.

win_textwidth() has been replaced by a simple macro wrapper around
win_draw_text() with a maximum width of zero, which results in a dry-run that
still calculates the number of pixels used by the text, much like snprintf(3)
with a buffer length of zero.

Code under a different license should be kept in a separate file. This
implemention is a single header file with ~65 lines, so it better fits this
requirement.