Man page / readme cleanups & one style fix

That's about it; Bump minor to 0.21 though really this code base is pretty stable at this point.

Make more robust to non-integral `$BLOCK_*SIZE`

That's about it (plus some README tweaks.)

Documentation fixes only release

See changelog for details.

Fix hyperlinks

Fix incorrect hyperlink path with absolute files.

Doc update release

This is really only a release to update documentation.

Bump to use more portable cligen/posixUt.findAssociated

Might work better on OpenBSD or other less popular Unices (if it works at all).

Better behavior running inside a deleted directory

No longer error out even though default "." may be unreadable.

Also some documentation changes & dep updates.

More documentation hacking

Better bit-by-bit.

Whole ${LC_CONFIG:-"~.config/lc}[/config]" mouthful still needs to get its own --help-config syntax somehow. For now just drop it since it's in the man page.

The README is now accurate

The 1-line install instructions now seem to work, providing a populated default $HOME/etc/lc config directory for the user to either hack directly or move to $HOME/.config/lc if they don't want to have a $HOME/etc at all (say).

This has a really good chance of nimble install lc just working..

..At least with the default ~/.nimble setup.