added some scripts in bin/

bin/convert-to-wav

@@ -0,0 +1,11 @@
+#!/usr/bin/perl -w
+
+use strict;
+
+foreach my $arg (@ARGV)
+{
+	my $out = $arg;
+	$out =~ s/\....$//;
+	system('mplayer', '-vo', 'null', '-ao', "pcm:file=$out.wav", $arg);
+}
+