PulseAudio 3.0

PulseAudio 3.0 compiles fine with minimal patching. This is the updated formular. PulseAudio works then and has CoreAudio support. To try out, edit `/usr/local/etc/pulse/default.pa` and change `module-detect` to `module-coreaudio-detect`.

Note that the HEAD also almost compiles. The script `git-version-info` fails because it cannot find the `.git` dir / git info. When trying that manually, something in the autogen fails - install-sh is missing.