Add profile notification spinach

features/profile/notifications.feature

+Feature: Profile Notifications
+  Background:
+    Given I sign in as a user
+    And I own project "Shop"
+
+  Scenario: I visit notifications tab
+    When I visit profile notifications page
+    Then I should see global notifications settings

features/steps/profile/profile_notifications.rb

+class ProfileNotifications < Spinach::FeatureSteps
+  include SharedAuthentication
+  include SharedProject
+
+  step 'I visit profile notifications page' do
+    visit profile_notifications_path
+  end
+
+  step 'I should see global notifications settings' do
+    page.should have_content "Setup your notification level"
+    page.should have_content "Global setting"
+  end
+end