Use the "M, j" format for last call end date too.

Add the year to the date field when it's not this year, using a new template tag "thisyear" which returns a boolean.
Also implement template tag "inpast" which I think could be useful for the meeting materials page.
 - Legacy-Id: 599

ietf/idtracker/templatetags/ietf_filters.py

@@ -7,6 +7,7 @@ try:
 except ImportError:
     from email import Utils as emailutils
 import re
+import datetime
 #from ietf.utils import log
 
 register = template.Library()
@@ -155,3 +156,17 @@ def rfcnospace(string):
 def lstripw(string, chars):
     """Strip matching leading characters from words in string"""
     return " ".join([word.lstrip(chars) for word in string.split()])
+
+@register.filter(name='thisyear')
+def thisyear(date):
+    """Returns a boolean of whether or not the argument is this year."""
+    if date:
+	return date.year == datetime.date.today().year
+    return True
+
+@register.filter(name='inpast')
+def inpast(date):
+    """Returns a boolean of whether or not the argument is in the past."""
+    if date:
+	return date < datetime.datetime.now()
+    return True

ietf/templates/idtracker/document_entry.html

@@ -4,11 +4,11 @@
   <td nowrap>
   {% ifequal doc.cur_state.state "In Last Call" %}
     {% if doc.document.lc_expiration_date %}
-      {{ doc.document.lc_expiration_date }}
+      {{ doc.document.lc_expiration_date|date:"M j" }}{% if not doc.lc_expiration_date|thisyear %}, {{ doc.lc_expiration_date|date:"Y" }}{% endif %}
     {% endif %}
   {% else %}
     {% if doc.status_date %}
-      {{ doc.status_date|date:"M j" }}
+      {{ doc.status_date|date:"M j" }}{% if not doc.status_date|thisyear %}, {{ doc.status_date|date:"Y" }}{% endif %}
     {% endif %}
   {% endifequal %}</td>
 {% else %}