feh v3.13

Switch default font from yudit to NotoSans Medium, and bundle its ttf file with feh. NotoSans has much better Unicode support than yudit, covering pretty much all of Latin, Cyrillic and Greek scripts. Note that it does not support Chinese, Japanese and Korean scripts -- please use the (not-yet-bundled) Noto CJK font family for those. yudit.ttf remains present to retain compatibility with users who have hardcoded it in themes, shell aliases, and feh commands in general.
Add new "make install" option: install_fonts=0 (default 1) skips installation of the bundled NotoSans-Medium.ttf and yudit.ttf files to font_dir. This may be helpful for distributions who wish to introduce a dependency on a system-wide NotoSans package instead. Note that this will increase feh's dependency footprint by far more than the single ttf file it uses, though. You should also make provisions to retain yudit.ttf where feh expects it (see above).
The font_path used within "make" can now be overridden from the commandline.