Xxh-xxh

**xxh**
Github branch support when install packages:

xxh +I xxh-shell-example+git+https://github.com/xxh/xxh-shell-example/tree/mybranch

**xxh and all xxh-shells**

New HOME and [XDG](https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html) logic:

1. `xxh usermyhost` - hermetic environment:


$XXH_HOME=/home/user/.xxh
$HOME =/home/user/.xxh
$XDG_HOME=/home/user/.xxh


2. `xxh usermyhost +hhh '~'` - semihermetic environment because if you run a tool that doesn't support XDG it will write to user home:


$XXH_HOME=/home/user/.xxh
$HOME =/home/user
$XDG_HOME=/home/user/.xxh

3. `xxh usermyhost +hhh '~' +hhx '~'` - xxh works like ssh:


$XXH_HOME=/home/user/.xxh
$HOME =/home/user
$XDG_HOME=/home/user

**xxh-plugin-bash-ohmybash**
* New plugin for xxh-shell-bash-zero!

**xxh**
* Fix directory names for package installation

**xxh.bash**
* Fix seamless mode

**xxh-dev**
* New tests for bash

**xxh**
Added `$XDG_CONFIG_HOME` support (https://ploum.net/207-modify-your-application-to-use-xdg-folders/).
Note you need to move your current config to `~/.config/xxh/config.xxhc`.

Fixed seamless mode

Maintenance