Author: Alistair Spark
MDL-51749 CALENDAR: Add ical export for user or group events
http://git.moodle.org/gw?p=moodle.git;a=commit;h=6552198130a4db03f2db4599cb170917fdd969e6
http://github.com/moodle/moodle/commit/6552198130a4db03f2db4599cb170917fdd969e6
+ 3.2 en [eventspersonal,core_calendar]
+ 3.2 en [eventsrelatedtogroups,core_calendar]