Author: Stephen Bourget
MDL-11369 mod_choice: Add calendar events for choice activities
http://git.moodle.org/gw?p=moodle.git;a=commit;h=9be8052937d125fe931947c3a9548c01a3a46dae
http://github.com/moodle/moodle/commit/9be8052937d125fe931947c3a9548c01a3a46dae
+ 3.2 en [calendarend,mod_choice]
+ 3.2 en [calendarstart,mod_choice]