Add formula for libsvg

Signed-off-by: David Höppner <0xffea@gmail.com>

* jpeg
* remove version
* prefix

Formula/libsvg.rb

@@ -0,0 +1,15 @@
+require 'formula'
+
+class Libsvg <Formula
+  url 'http://cairographics.org/snapshots/libsvg-0.1.4.tar.gz'
+  homepage 'http://cairographics.org/'
+  md5 'ce0715e3013f78506795fba16e8455d3'
+
+  depends_on 'libpng'
+  depends_on 'jpeg'
+
+  def install
+    system "./configure", "--prefix=#{prefix}"
+    system "make install"
+  end
+end