New formula: ditaa

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>

Formula/ditaa.rb

@@ -0,0 +1,25 @@
+require 'formula'
+
+class Ditaa <Formula
+  url 'http://downloads.sourceforge.net/project/ditaa/ditaa/0.9/ditaa0_9.zip'
+  homepage 'http://ditaa.sourceforge.net/'
+  md5 '23f2e5ede60ef7763309c08addca071a'
+
+  def jar
+    'ditaa0_9.jar'
+  end
+
+  def script
+<<-EOS
+#!/bin/sh
+# A wrapper for ditaa.
+
+java -jar #{prefix}/#{jar} "$@"
+EOS
+  end
+
+  def install
+    prefix.install jar
+    (bin+'ditaa').write script
+  end
+end