lsix

Turns out ImageMagick 7 has deprecated using magick convert as well, which is silly. Our solution: alias both convert and montage to do the right thing for IM7. This is uglier than the previous solution, but that's okay if it works.

Use IM7's 'magick' binary if it exists. Closes #73. Closes #78.

Minor typo from 1.8.1. Compared to 1.8.0, now handles animated webp format same as gif (just first frame).

Only show first frame if no filenames were specified on the command line.

After purchasing a genuine DEC VT340 terminal, @hackerb9 has learned that the DEC VT340 graphics programmer's manual was mistaken and the sense of DECSDM should be inverted. Nearly every terminal emulator which built upon that reference over the last thirty years is incorrect. Some are correcting the error now, some never were wrong, but we are at a time when it is not safe to presume what setting DECSDM means.

For now, lsix will simply presume that sixel scrolling is enabled and hope that no program has been run before it that disables it.

See https://github.com/hackerb9/lsix/issues/41 for details.

Thanks go to @j4james for pointing out the mistake and for testing multiple terminal emulators to show that none of them currently default to having sixel scrolling disabled.

The last release added a regression such that files specified on the command line could not have spaces. All good now.

Add support for viewing directories specified on the command line. Also, webp is shown by default now. Other minor fixes like dash at the beginning of a filename and checking the LSIX_FORCE_SIXEL_SUPPORT variable.

Various patches, including the ones that helped with MacOS support.

Now detects if the terminal cannot handle SIXEL and exits with an error.

All the basics working release.