Updates to work with Rails 4.x, hat tip to jheiss and laserlemon

Gemfile

@@ -2,7 +2,7 @@ source 'http://rubygems.org'
 
 gem 'bundler'
 gem 'rake'
-gem 'rails', '3.2.12'
+gem 'rails', '>= 4.0.0'
 gem 'rack'
 gem 'jeweler'
 gem 'sqlite3'

acts-as-dag.gemspec

@@ -9,7 +9,7 @@ Gem::Specification.new do |s|
   s.email       = ["resgraph@cox.net"]
   s.homepage    = 'https://github.com/resgraph/acts-as-dag'
   s.summary     = %q{Directed Acyclic Graph hierarchy for Rail's ActiveRecord}
-  s.description = %q{Directed Acyclic Graph hierarchy for Rail's ActiveRecord}
+  s.description = %q{Directed Acyclic Graph hierarchy for Rail's ActiveRecord, supporting Rails 4.x}
 
   s.rubyforge_project = "acts-as-dag"
 
@@ -19,9 +19,8 @@ Gem::Specification.new do |s|
   s.require_paths = ["lib"]
 
   # As specified in test/dag_test.rb
-  s.add_development_dependency 'activerecord', '~> 3.2.12'
   s.add_development_dependency 'rake'
   s.add_development_dependency 'sqlite3'
   s.add_runtime_dependency 'activemodel'
-  s.add_runtime_dependency 'activerecord'
+  s.add_runtime_dependency 'activerecord', '~> 4.0', '>= 4.0.0'
 end

lib/acts-as-dag/version.rb

@@ -1,7 +1,7 @@
 module Acts
   module As
     module Dag
-      VERSION = "3.0.0"
+      VERSION = "4.0.0"
     end
   end
 end

test/dag_test.rb

@@ -1,6 +1,6 @@
 require 'test/unit'
 require 'rubygems'
-gem 'activerecord', '~> 4.0.2'
+gem 'activerecord', '~> 4.1.0'
 require "./init"
 I18n.enforce_available_locales = true