[cadcdev-tiki] Dreamcast audio streaming

[Sam S. <sam...@gm...>]

I just checked in a Stream wrapper for KOS's streaming API.  It seems  
to work fine with the VorbisStream class, but it skips a lot if you  
stream over /pc.  Streaming from /rd seems to be fine, I don't have  
any CD-Rs to test streaming off the CD.

-Sam