Move rigboard templates up a level

Also:
- Find and replace panel -> card
- Some base template work
- gulpfile things, added dep on django-gulp

RIGS/templates/eventauthorisation_client_success.html

@@ -0,0 +1,21 @@
+{% extends 'base_client_email.html' %}
+
+{% block content %}
+    <p>Hi {{ to_name|default:"there" }},</p>
+
+    <p>
+        Your event <b>N{{ object.event.pk|stringformat:"05d" }}</b> has been successfully authorised
+        for <b>&pound;{{ object.amount }}</b>
+        by <b>{{ object.name }}</b> as of <b>{{ object.event.last_edited_at }}</b>.
+    </p>
+
+    <p>
+        {% if object.event.organisation and object.event.organisation.union_account %}{# internal #}
+            Your event is now fully booked and payment will be processed by the finance department automatically.
+            {% else %}{# external #}
+            Your event is now fully booked and our finance department will be contact to arrange payment.
+        {% endif %}
+    </p>
+
+    <p>TEC PA &amp; Lighting</p>
+{% endblock %}