BREAKING CHANGE: The `apache2` webserver has been replaced with `nginx` and `php-fpm`, be sure to uninstall `apache2` and clean related configuration files from your system before upgrading.
- remove unused root packages.ini
- write config to yaml file
- allow to set public_url during install
- force icecast start right after package install
- move config file in place at the end of installation
BREAKING CHANGE: The bash installer has been rewritten, the flags and
options changed, please run `./install --help` to get more details.