Conflicts:
lib/bennu/readme_moodle.txt
4/ updated rfc2445_is_valid_value() to accept single part rrule as a valid value (16 Jun 2014)
5/ updated DTEND;TZID and DTSTAR;TZID values to support quotations (7 Nov 2014)
6/ added calendar_normalize_tz function to convert region timezone to php supported timezone (7 Nov 2014)
-7/ added timestamp_to_date function to support zero duration events (4 Sept 2015)
+7/ MDL-49032: fixed rfc2445_fold() to fix incorrect RFC2445_WSP definition (16 Sep 2015)
++8/ added timestamp_to_date function to support zero duration events (16 Sept 2015)