This plugin is an alternative to the native batch rename interface in
nnn. qmv from renameutils and vidir from moreutils allow to rename
files without fear of replacing existing files.

* Improved completion support for files with spaces

Filenames with spaces, both generally and for session names, will now
complete as expected.

* Misc shell script improvements

See discussion on:
1cca9e4b72

1. getplugs should work even if nnn is not run
2. Remove redundant ./ prefix
3. Update plugin docs

* getpulgs now asks before overwriting

* Forgot a space

xargs couldn't call function `dnd()` and I couldn't find a portable way
to do it, so I replaced it with a variable which I guess should work
fine.

For w/e reason the output from `which` causes problems with nnn
rendering. This commit silences the problematic lines.