beets doesn't deal with hybrid WavPack files correctly

[GoogleCodeExporter]

What's the problem? How can I reproduce it?

WavPacks hybrid mode creates two files per track (described at Wikipedia: 
https://en.wikipedia.org/wiki/Wavpack#Hybrid_mode). Currently, beets counts 
every file as being one track, so an album with N tracks encoded as hybrid 
WavPack will results in beets asking MusicBrainz for an album with 2*N tracks. 
Simply adding *wvc to the ignored files isn't enough, they have to be moved 
with the main files as well.

So there are two steps needed to fix this:
1) ignore *wvc files when importing files
2) move the wvc files together with the wv files

Original issue reported on code.google.com by themineo on 12 Jul 2012 at 9:45

[untitaker]

Do not comment here, but on beetbox/beets#160