#131 CDDA endianess wrong

[Martin Natano]

sox assumes that CD-Audio (Red Book) is big endian encoded, but CDDA is little endian. Verified by ripping a track from a cd and playing it back with sox. (Various sources on the internet also confirm it as little endian, e.g. Wikipedia and multimedia wiki.)

play track-01.cdda results in noise output.
play -L track-01.cdda results in correct playback.

Attached is a patch for a fixed format definition