add formula for rlwrap

rlwrap wraps another command giving it readline editing ability.

This is useful for interactive programs like clojure which don't provide readline support.

http://en.wikibooks.org/wiki/Clojure_Programming/Getting_Started#Enhancing_Clojure_REPL_with_rlwrap

Formula/rlwrap.rb

@@ -0,0 +1,14 @@
+require 'formula'
+
+class Rlwrap <Formula
+  url 'http://utopia.knoware.nl/~hlub/uck/rlwrap/rlwrap-0.32.tar.gz'
+  homepage 'http://utopia.knoware.nl/~hlub/uck/rlwrap'
+  md5 '441282a9a65c1d516c1c9a6821184539'
+
+  depends_on 'readline'
+
+  def install
+    system "./configure", "--prefix=#{prefix}", "--disable-debug", "--disable-dependency-tracking"
+    system "make install"
+  end
+end