Add Patchwork to autoload
Variables should not start with underscore
Missing license info.

License info for Composer and Patchwork/UTF-8 is missing
Stop loading composer for AVH when it's already loaded.
Add mu-plugins file.

As WordPress only scans for files in the mu-pluigns directory a file is needed to act as a loader. The file is called avh-framework.php
Add PHP requirement
Check earlier is framework has been loaded.

Instead of checking in the bootstrap.php file, we check if the framework has been loaded earlier before we load the bootstrap file.
Update installation instructions.