Simple DVD-Audio playback submodule using new libdvdread

This merge request adds the ability to playback DVD-audio discs using the second title table in the AMG and the ATS track table, this playback mode works exactly like the dvdsimple module

notes

1. There is sometimes mlp synchronization packet issue, and some packets are dropped. This is unrelated to libdvdread or libdvdcss. I'm not sure why it happens but it's probably something to do with the submodule !7557 (merged) fixes this issue
2. This only plays the titles listed as audio titles in IFO
3. there is no support for DVD-Audio menus.. for now :)