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_mic_success.txt

@@ -0,0 +1,5 @@
+Hi {{object.event.mic.get_full_name|default_if_none:"somebody"}},
+
+Just to let you know your event N{{object.event.pk|stringformat:"05d"}} has been successfully authorised for £{{object.amount}} by {{object.name}} as of {{object.event.last_edited_at}}.
+
+The TEC Rig Information Gathering System