Fixed login, new_password and invitation views.

app/helpers/application_helper.rb

@@ -130,4 +130,17 @@ module ApplicationHelper
       :target => "_blank"
   end
 
+  def bootstrap_flash
+    flash_messages = []
+    flash.each do |type, message|
+      type = :success if type == :notice
+      type = :error   if type == :alert
+      text = content_tag(:div,
+                         content_tag(:button, raw("×"), :class => "close", "data-dismiss" => "alert") +
+                             message, :class => "alert fade in alert-#{type}")
+      flash_messages << text if message
+    end
+    flash_messages.join("\n").html_safe
+  end
+
 end