Fix PendingDeprecationWarning for cycle tag on Django 1.6+

djrill/templates/djrill/senders_list.html

@@ -1,6 +1,8 @@
 {% extends "admin/base_site.html" %}
 {% load admin_list i18n %}
 {% load url from future %}
+{% load cycle from djrill_future %}
+
 {% block extrastyle %}
   {{ block.super }}
   <link rel="stylesheet" type="text/css" href="{{ STATIC_URL }}admin/css/changelists.css" />

djrill/templates/djrill/tags_list.html

@@ -1,6 +1,8 @@
 {% extends "admin/base_site.html" %}
 {% load admin_list i18n %}
 {% load url from future %}
+{% load cycle from djrill_future %}
+
 {% block extrastyle %}
   {{ block.super }}
   <link rel="stylesheet" type="text/css" href="{{ STATIC_URL }}admin/css/changelists.css" />

djrill/templates/djrill/urls_list.html

@@ -1,6 +1,8 @@
 {% extends "admin/base_site.html" %}
 {% load admin_list i18n %}
 {% load url from future %}
+{% load cycle from djrill_future %}
+
 {% block extrastyle %}
   {{ block.super }}
   <link rel="stylesheet" type="text/css" href="{{ STATIC_URL }}admin/css/changelists.css" />

djrill/templatetags/djrill_future.py

@@ -0,0 +1,16 @@
+# Future templatetags library that is also backwards compatible with
+# older versions of Django (so long as Djrill's code is compatible
+# with the future behavior).
+
+from django import template
+
+# Django 1.8 changes autoescape behavior in cycle tag.
+# Djrill has been compatible with future behavior all along.
+try:
+    from django.templatetags.future import cycle
+except ImportError:
+    from django.template.defaulttags import cycle
+
+
+register = template.Library()
+register.tag(cycle)