Author: Ankit Agarwal
MDL-36621 calendar: cache calendar subscriptions and showicalsource setting
Now MUC is used to cache subscription information when the constructor for an event is called, which is child of a ical subscription.
A new setting calendar_showicalsource is introduced which controls if the ical source should be displayed along with events in the calendar
Also minor changes has been done in places to make sure subscription id is always associated with ical events
http://git.moodle.org/gw?p=moodle.git;a=commit;h=e73b527c82be6ab30fe972a3987c83fec86ba5cb
http://github.com/moodle/moodle/commit/e73b527c82be6ab30fe972a3987c83fec86ba5cb
+ 2.5 en [configshowicalsource,core_admin]
+ 2.5 en [helpshowicalsource,core_admin]