euscanwww: better index

Thanks to George Prowse for the idea.

Signed-off-by: Corentin Chary <corentincj@iksaif.net>

euscanwww/euscan/templatetags/timedelta.py

@@ -0,0 +1,19 @@
+from django import template
+from django.utils.timesince import timesince
+from datetime import datetime
+
+register = template.Library()
+
+def timedelta(value, arg=None):
+    if not value:
+        return ''
+    if arg:
+        cmp = arg
+    else:
+        cmp = datetime.now()
+    if value > cmp:
+        return "in %s" % timesince(cmp,value)
+    else:
+        return "%s ago" % timesince(value,cmp)
+
+register.filter('timedelta',timedelta)