apply this diff to stories.rb to make it work with ruby 1.9.2

stories.rb.diff

diff --git a/ruby/stories.rb b/ruby/stories.rb
index acbfcb0..36b435a 100755
--- a/ruby/stories.rb
+++ b/ruby/stories.rb
@@ -2,7 +2,7 @@
 
 require 'rubygems'
 require 'json'
-require 'md5'
+require 'digest/md5'
 require 'net/http'
 require 'uri'
 
@@ -36,7 +36,7 @@ class StoryFinder
   end
 
   def sign(url)
-    "#{url}?dev_key=#{@key}&sig=#{MD5.new(@key + @secret + Time.now.to_i.to_s).hexdigest}"
+    "#{url}?dev_key=#{@key}&sig=#{Digest::MD5.hexdigest(@key + @secret + Time.now.to_i.to_s)}"
   end
 end