Autorequire bundled libraries by default

railties/lib/generators/rails/app/templates/config/boot.rb

@@ -16,6 +16,9 @@ rescue LoadError
   # require 'rubygems'
 end
 
+# Auto-require all bundled libraries.
+Bundler.require
+
 <% unless  options[:skip_activerecord] -%>
 require 'rails/all'
 
@@ -40,4 +43,4 @@ require "action_view/railtie"
 require "action_mailer/railtie"
 require "active_resource/railtie"
 require "rails/test_unit/railtie"
-<% end  -%>
+<% end  -%>