Added formula for libKML

libKML is Google's libarary for reading and writing KML and KMZ files.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>

Formula/libkml.rb

@@ -0,0 +1,12 @@
+require 'formula'
+
+class Libkml <Formula
+  url 'http://libkml.googlecode.com/files/libkml-1.2.0.tar.gz'
+  homepage 'http://code.google.com/p/libkml/'
+  md5 '25d534437f971bf55a945608e39fea79'
+
+  def install
+    system "./configure", "--prefix=#{prefix}"
+    system "make install"
+  end
+end