updated readme

app/helpers/error_messages_helper.rb

@@ -0,0 +1,23 @@
+module ErrorMessagesHelper
+  # Render error messages for the given objects. The :message and :header_message options are allowed.
+  def error_messages_for(*objects)
+    options = objects.extract_options!
+    options[:header_message] ||= I18n.t(:"activerecord.errors.header", :default => "Invalid Fields")
+    options[:message] ||= I18n.t(:"activerecord.errors.message", :default => "Correct the following errors and try again.")
+    messages = objects.compact.map { |o| o.errors.full_messages }.flatten
+    unless messages.empty?
+      content_tag(:div, :class => "error_messages") do
+        list_items = messages.map { |msg| content_tag(:li, msg) }
+        content_tag(:h2, options[:header_message]) + content_tag(:p, options[:message]) + content_tag(:ul, list_items.join.html_safe)
+      end
+    end
+  end
+
+  module FormBuilderAdditions
+    def error_messages(options = {})
+      @template.error_messages_for(@object, options)
+    end
+  end
+end
+
+ActionView::Helpers::FormBuilder.send(:include, ErrorMessagesHelper::FormBuilderAdditions)