Log Message:
Add wip/audio-mml, which is essentially current RAT (mbone/rat) from
their svn repository.  Currently it installs what are usually built
as convenience libraries as one full-fledged libtool library.

I'm hoping to experiment soon with using the audio layer (with its
excellent NetBSD support courtesy of developer Brook Milligan).
I haven't tried it yet, but it seems to also have some really slick
sound buffering code and of course RTP support, etc.

[Hopefully] more commits to come.