Install taglib-extras with Taglib

Formula/taglib.rb

@@ -1,5 +1,10 @@
 require 'brewkit'
 
+class TaglibExtras <UnidentifiedFormula
+  @url='http://kollide.net/~jefferai/taglib-extras-0.1.6.tar.gz'
+  @md5='706a82fe4c25606f731faf4c14b5edb0'
+end
+
 class Taglib <Formula
   @url='http://developer.kde.org/~wheeler/files/src/taglib-1.5.tar.gz'
   @md5='7b557dde7425c6deb7bbedd65b4f2717'
@@ -8,5 +13,10 @@ class Taglib <Formula
   def install
     system "./configure --disable-debug --prefix='#{prefix}'"
     system "make install"
+    
+    TaglibExtras.new.brew do |f|
+      system "cmake . #{std_cmake_parameters}"
+      system "make install"
+    end unless ARGV.include? '--no-extras'
   end
 end