Update docs/install-vkclone.md
Update setup script.

Use another `basename` syntax.
Update config.sh.example.

Update rsync exclude options.
Update docs/install-vkclone.md
Fix accessRules() in users/DefaultController.php.
Update docs.

Updated files:
- docs/conventions.md
- docs/index.md
- docs/requirements.md

Fix mistakes, cut feelings, update info.