Add formula for the Judy dynamic array library

From the website:

"Judy is a C library that provides a state-of-the-art core technology
that implements a sparse dynamic array. Judy arrays are declared simply
with a null pointer. A Judy array consumes memory only when it is
populated, yet can grow to take advantage of all available memory if
desired."

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

Formula/judy.rb

@@ -0,0 +1,14 @@
+require 'formula'
+
+class Judy <Formula
+  url 'http://downloads.sourceforge.net/project/judy/judy/judy-1.0.5/judy-1.0.5.tar.gz'
+  homepage 'http://judy.sourceforge.net/'
+  md5 '115a0d26302676e962ae2f70ec484a54'
+
+  def install
+    system "./configure", "--disable-debug", "--disable-dependency-tracking",
+                          "--prefix=#{prefix}"
+    ENV.j1 # Doesn't compile on parallel build
+    system "make install"
+  end
+end