Rails 2.3 compatibility

README.mdown

@@ -62,10 +62,19 @@ Put the following in your gemfile as well:
 gem 'SystemTimer'
 ```
 
-### Rails
+### Rails 3
 
 Split is autoloaded when rails starts up, as long as you've configured redis it will 'just work'.
 
+### Rails 2.3
+
+To configure Rails 2.3 with Split you need to mix in the helper methods. Add the following lines to config/initializers.split.rb:
+
+```ruby
+ActionController::Base.send :include, Split::Helper
+ActionController::Base.helper Split::Helper
+```
+
 ### Sinatra
 
 To configure sinatra with Split you need to enable sessions and mix in the helper methods. Add the following lines at the top of your sinatra app:

lib/split.rb

@@ -2,7 +2,7 @@
   require "split/#{f}"
 end
 
-require 'split/engine' if defined?(Rails)
+require 'split/engine' if defined?(Rails) && Rails::VERSION::MAJOR >= 3
 require 'redis/namespace'
 
 module Split