Author: Charles Fulton
MDL-11047 quiz: enable sequential navigation
http://git.moodle.org/gw?p=moodle.git;a=commit;h=33c8d37b6f2fa380a50ef97d60103ed9a1f9c376
http://github.com/moodle/moodle/commit/33c8d37b6f2fa380a50ef97d60103ed9a1f9c376
+ 2.3 en [confignavmethod,mod_quiz]
+ 2.3 en [navmethod,mod_quiz]
+ 2.3 en [navmethod_free,mod_quiz]
+ 2.3 en [navmethod_help,mod_quiz]
+ 2.3 en [navmethod_seq,mod_quiz]
+ 2.3 en [returnattempt,mod_quiz]