Author: Rajesh Taneja
MDL-40058 mod_wiki: Replaced add_to_log for page version viewed to event
http://git.moodle.org/gw?p=moodle.git;a=commit;h=8b43cf225f9289ebd7fbf606b0baba67a29a3ca2
http://github.com/moodle/moodle/commit/8b43cf225f9289ebd7fbf606b0baba67a29a3ca2
+ 2.7 en [eventversionviewed,mod_wiki]