added message display to base.html

{{cookiecutter.repo_name}}/{{cookiecutter.repo_name}}/templates/base.html

@@ -53,6 +53,12 @@
 
     <div class="container">
 
+      {% if messages %}
+        {% for message in messages %}
+          <div class="alert {% if message.tags %}alert-{{ message.tags }}"{% endif %}>{{ message }}</div>
+        {% endfor %}
+      {% endif %}
+
       {% block content %}
         <p>Use this document as a way to quick start any new project.</p>
       {% endblock content %}