3.5.01

Some finalizing of new features and small issue/bug fixes.

See acxi.changelog for full details: https://github.com/smxi/acxi/raw/stable/acxi.changelog

Main features:

1. --clean requires full paths to be safely used, that is now enforced.
2. -Z/-Xq now can be used with any input type, not just flac.
3. --resample is completed with explicit dither type and also --dither {types} option. ffmpeg does not use dither when resampling by default, now uses shibata for all resamples below 24 bit depth, in others words, at least 99.9% of all users of acxi for resampling.
4. Added support for standard distro override: /etc/acxi.conf.d/acxi.conf - why not?
5. More internal refactors and cleanups to make code easier to maintain and use long term.

And that's it, these are the expected small glitch fixes, and fine-tunings for the 3.5.01 primary release. All appears shipshape,, all features are complete to the level that I think it matters to most users, including myself, so maybe will slow again now until new needs or issues arise.