Refinements to the demo templates

Author: Mark Gibbs

demo/demo/templates/demo_two.html

@@ -1,5 +1,6 @@
 {%extends "base.html"%}
 {%load plotly_dash%}
+{%block post_body%}{%plotly_message_pipe%}{%endblock%}
 {%block title%}More Examples{%endblock%}
 {%block content%}
 <div>

demo/demo/templates/index.html

@@ -1,6 +1,5 @@
 {%extends "base.html"%}
 {%block title%} Index{%endblock%}
-{%load plotly_dash%}
 {%block content%}
   <div>
     This is the django_plotly_dash demo application.