fixed events plugin to create output folder if missing

plugins/events.py

@@ -83,7 +83,7 @@ def parse_recursion(ev, field_name):
     freq = chunks[0].upper()
     if 'until' in chunks:
         until = datetime.strptime(chunks[-1], '%Y-%m-%d')
-        rrule = [freq, until] 
+        rrule = [freq, until]
     else:
         rrule = [freq]
     return rrule
@@ -126,6 +126,9 @@ def generate_ical_file(generator):
     if not ics_fname:
         return
 
+    if not os.path.exists(generator.settings['OUTPUT_PATH']):
+        os.makedirs(generator.settings['OUTPUT_PATH'])
+
     ics_fname = os.path.join(generator.settings['OUTPUT_PATH'], ics_fname)
     log.debug("Generating calendar at %s with %d events" % (ics_fname, len(events)))
 
@@ -148,7 +151,7 @@ def generate_ical_file(generator):
 
         ie = icalendar.Event(
             summary=e.metadata['title'],
-            dtstart=dtstart, 
+            dtstart=dtstart,
             dtend=dtend,
             dtstamp= dtstamp,
             priority=5,