Merge pull request #13 from sanemat/multi-json-in-rails-case

Compatible multi_json >= 1.0.0 with Rails3.2.8

lib/compat/multi_json.rb

@@ -1,6 +1,9 @@
 require 'multi_json'
 
-if !MultiJson.respond_to?(:load) || MultiJson.method(:load).owner == Kernel
+if !MultiJson.respond_to?(:load) || [
+  Kernel,
+  defined?(ActiveSupport::Dependencies::Loadable) && ActiveSupport::Dependencies::Loadable
+].compact.include?(MultiJson.method(:load).owner)
   module MultiJson
     class <<self
       alias :load :decode