Author: Laurent David
MDL-73306 mod_bigbluebuttonbn: "Recently Activity" block display
* The callback 'xxx_print_recent_activity' needed to be created in order to display
the activities in the block
* Use the print_recent_activity_note api function
http://git.moodle.org/gw?p=moodle.git;a=commit;h=09ba0cb9a84d835701fbc6c302ad418b4f39a784
http://github.com/moodle/moodle/commit/09ba0cb9a84d835701fbc6c302ad418b4f39a784
+ 4.0 en [event_unknown,mod_bigbluebuttonbn]
+ 4.0 en [new_bigblubuttonbn_activities,mod_bigbluebuttonbn]