Added possibility to give feedbacks via ajax form. Closes #2

* Feedback message will send to error_recipients, configured in app_config.yml

app/controllers/feedback_controller.rb

@@ -0,0 +1,20 @@
+class FeedbackController < ApplicationController
+
+  def new
+    render :update do |page|
+      page.replace_html :ajax_box, :partial => "new"
+      page.show :ajax_box
+    end
+  end
+
+  def create
+    unless params[:message].blank?
+      Mailer.deliver_feedback(current_user, params[:message])
+    end
+
+    render :update do |page|
+      page.replace_html :ajax_box, :partial => "success"
+    end
+  end
+
+end