Add addon config

This makes it possible to use the addons build of React.

Closes #13

Author: zpao

README.md

@@ -51,6 +51,8 @@ To transform your JSX into JS, simply create `.js.jsx` files, and ensure that th
 
 ## Configuring
 
+### Variants
+
 There are 2 variants available. `:development` gives you the unminified version of React. This provides extra debugging and error prevention. `:production` gives you the minified version of React which strips out comments and helpful warnings, and minifies.
 
 ```ruby
@@ -65,6 +67,16 @@ MyApp::Application.configure do
 end
 ```
 
+### Add-ons
+
+Beginning with React v0.5, there is another type of build. This build ships with some "add-ons" that might be useful - [take a look at the React documentation for details](http://facebook.github.io/react/docs/addons.html). In order to make these available, we've added another configuration (which defaults to `false`).
+
+```ruby
+MyApp::Application.configure do
+  config.react.addons = true
+end
+```
+
 
 ## CoffeeScript
 

lib/react/rails/railstie.rb

@@ -14,11 +14,13 @@ class Railtie < ::Rails::Railtie
         # common mistakes. These are all stripped out in the minified build.
         if variant = app.config.react.variant || ::Rails.env.test?
           variant ||= :development
+          addons = app.config.react.addons || false
+
           # Copy over the variant into a path that sprockets will pick up.
           # We'll always copy to 'react.js' so that no includes need to change.
           # We'll also always copy of JSXTransformer.js
           tmp_path = app.root.join('tmp/react-rails')
-          filename = 'react' + (variant == :production ? '.min.js' : '.js')
+          filename = 'react' + (addons ? '-with-addons' : '') + (variant == :production ? '.min.js' : '.js')
           FileUtils.mkdir_p(tmp_path)
           FileUtils.cp(::React::Source.bundled_path_for(filename),
                        tmp_path.join('react.js'))