I'm just finding version 6 on GitHub, but I want to use version 5 that has the following files:
dompdf/
|--include/
|--lib/
|--changelog.txt
|--docblox.dist.xml
|--dompdf.php
|--dompdf_config.custom.inc.php
|--dompdf_config.inc.php
|--LICENSE.LGPL
|--load_font.php