Make feed machine-friendly (e.g. pubDate)

fortunefeed.py

 import sys
 from subprocess import Popen, PIPE
+from datetime import datetime, timedelta
 from min_rss_gen.generator import start_rss, gen_item
 import xml.etree.ElementTree
 
 FEED_TITLE = 'Fortune'
 FEED_DESCRIPTION = 'Random, hopefully interesting, adages'
 NUM_ITEMS = 3
-MAX_LENGTH = 42
+MAX_LENGTH = 69
 
 rss_items = []
 
 for i in range(NUM_ITEMS):
     with Popen(['fortune', '-s', '-n', str(MAX_LENGTH)], encoding='utf-8', stdout=PIPE) as fortune:
-        rss_items.append(gen_item(title=fortune.stdout.read().strip().replace('\n',' ').replace('\t',' ')))
+        rss_items.append(gen_item(
+            title=fortune.stdout.read().strip().replace('\n',' ').replace('\t',' '),
+            link=FEED_LINK,
+            pubDate=(datetime.now()-timedelta(minutes=i)).isoformat()))
 
 rss_xml_element = start_rss(
     title=FEED_TITLE, link=FEED_LINK,