Xxh-xxh

**xxh-shell-xonsh-appimage**
* Updated to xonsh 0.9.15.
* Fix portable pip bin directory. Now you can `xxh myhost +s xonsh` and `pip install xxh-xxh`.

**xxhp**
* Shell commands now pure python. Next step to AppImage

**xxh**
* Fix rsync on macos

Bump version

**xxh-shell-zsh-romkatv**
* New incredible [statically-linked, hermetic, relocatable Zsh](https://github.com/romkatv/zsh-bin) from Roman Perepelitsa

**xxhp**
* Fix name check

xxh now on pure python. It's the first step to binary and AppImage versions.