mp3 support added to FlacWavLoader

Yeah… mp3 support. This is strictly a convenience thing as suggested by WGH on It does not decode the mp3 files to wav, it simply copies them and adds them to the play list. I did experiment with converting to wav and perhaps they sound a little better but the standard version of SoX does not contain the needed library to decode them due to licensing restrictions. While I did try adding the needed libmad library and it worked, I thought this too much of a pain for a non techno user.

This code may have added new bugs but it seems stable. I’ve been using it all day at work with no issues. If you find a problem please report it.