added narwhal formula

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

* Install everything to libexec and link in the binaries

Formula/narwhal.rb

@@ -0,0 +1,13 @@
+require 'formula'
+
+class Narwhal <Formula
+  head 'git://github.com/tlrobinson/narwhal.git'
+  homepage 'http://www.narwhaljs.org/'
+
+  def install
+    rm Dir['bin/*.cmd']
+    libexec.install Dir['*']
+    bin.mkpath
+    Dir["#{libexec}/bin/*"].each { |d| ln_s d, bin }
+  end
+end