Use autoload

lib/base.php

lib/connector/sabre/auth.php

lib/connector/sabre/directory.php

lib/connector/sabre/file.php

lib/connector/sabre/locks.php

lib/connector/sabre/node.php

lib/db.php

lib/files.php

lib/group.php

lib/group/backend.php

lib/group/database.php

lib/hook.php

lib/user.php

lib/user/backend.php

lib/user/database.php

lib/user/example.php

lib/util.php