Minor updates.
* Added Cryptura Academy monster spawns, commented until the scripts are implemented. Does not include monsters from job quests.
* Fixed two label errors in Wizard job quest. (bugreport:8590)
http://rathena.org/board/tracker/issue-8590-wizard-job-quest-label-error/
* Updated AUTHORS file. (credits to AnnieRuru and Keyworld for providing some missing names)
* Uncommented a mapflag in custom 'mvp_ladder' script. (credits: AnnieRuru)

Signed-off-by: Euphy <euphy.raliel@rathena.org>