Add libdiscid formula.

Library/Formula/libdiscid.rb

@@ -0,0 +1,14 @@
+require 'formula'
+
+class Libdiscid < Formula
+  homepage 'http://musicbrainz.org/doc/libdiscid'
+  url 'http://users.musicbrainz.org/~matt/libdiscid-0.2.2.tar.gz'
+  sha1 '103ead94eeb8bea04ad92ab15ed6832be9b3fad9'
+
+  def install
+    system "./configure", "--disable-debug", "--disable-dependency-tracking",
+                          "--prefix=#{prefix}"
+    system "make install"
+  end
+
+end