Add page <title>s to tour pages

app/main/views/tour.py

@@ -4,6 +4,14 @@ from flask_login import login_required
 from app.main import main
 
 
+headings = [
+    'Trial mode',
+    'Start with templates',
+    'Add recipients',
+    'Send your messages',
+]
+
+
 @main.route("/services/<service_id>/tour/<int:page>")
 @login_required
 def tour(service_id, page):
@@ -11,5 +19,6 @@ def tour(service_id, page):
         'views/tour/{}.html'.format(page),
         service_id=service_id,  # TODO: fix when Nick’s PR is merged
         current_page=page,
-        next_page=(page + 1)
+        next_page=(page + 1),
+        heading=headings[page - 1]
     )