Get tests passing with ActiveSupport 3

Rakefile

@@ -43,5 +43,9 @@ Spec::Rake::SpecTask.new do |t|
 end
 task :spec => :check_dependencies
 
-desc "Run tests"
-task :default => :spec
+task :default do
+  %w(2.3.5 3.0.0.beta3).each do |version|
+    puts "Running specs with Rails #{version}"
+    system("RAILS_VERSION=#{version} rake -s spec;")
+  end
+end

lib/tinder.rb

@@ -1,4 +1,5 @@
 require 'active_support'
+require 'active_support/json'
 
 require 'tinder/connection'
 require 'tinder/multipart'

lib/tinder/connection.rb

@@ -1,4 +1,5 @@
 require 'httparty'
+require 'active_support/core_ext/hash/indifferent_access'
 
 # override HTTParty's json parser to return a HashWithIndifferentAccess
 module HTTParty

spec/spec_helper.rb

@@ -2,6 +2,7 @@
 
 require 'rubygems'
 require 'spec'
+gem 'activesupport', ENV['RAILS_VERSION'] if ENV['RAILS_VERSION']
 require 'tinder'
 require 'fakeweb'