Support for WAV files for CD audio tracks

[GoogleCodeExporter]

Gens should support WAV files as an alternative to MP3 files, both when
they are specified as type WAV in a cue file, and when there is no cue file
and they are found by the auto-search.

While WAV doesn't seem to offer much advantage over binary audio or MP3
files, apparently enough people have their CD audio tracks in WAV format
that it would be worthwhile to support it.

Original issue reported on code.google.com by nitsuja-@hotmail.com on 30 Jul 2008 at 5:20

[GoogleCodeExporter]

Looking at the wav format, it should be extremely easy to support 44100 hz 
stereo
16-bit PCM wav files, but I'm not sure about converting up from 8-bit, or 
resampling
from 11025, 22050, or 48000 hz samples

Original comment by Upth...@gmail.com on 31 Jul 2008 at 3:50

[GoogleCodeExporter]

There should be no reason to add resampling. CD audio is strictly defined as 
16-bit 44.1 kHz stereo PCM. Anything outside of this would have been 
down/upsampled from the original audio.

Original comment by trmche...@gmail.com on 17 Nov 2011 at 12:47