Support controller callbacks for Rails 3..5

`before_filter` is deprecated in Rails 5 and will disappear in 5.1

This change begins using `before_action`, with a fallback to
`before_filter` if `before_action` is not available.

closes #404

Author: danott

lib/react/rails/controller_lifecycle.rb

@@ -4,9 +4,11 @@ module ControllerLifecycle
       extend ActiveSupport::Concern
 
       included do
-        # use old names to support Rails 3
-        before_filter :setup_react_component_helper
-        after_filter :teardown_react_component_helper
+        # use both names to support Rails 3..5
+        before_action_with_fallback = begin method(:before_action); rescue method(:before_filter); end
+        after_action_with_fallback = begin method(:after_action); rescue method(:after_filter); end
+        before_action_with_fallback.call :setup_react_component_helper
+        after_action_with_fallback.call :teardown_react_component_helper
         attr_reader :__react_component_helper
       end