Notification of string changes

Author: Tim Hunt
MDL-20636 It is now possible to save a truefalse question you have created.
This includes all the necessary DB upgrades.

Also all unit tests in question/type/simpletest and question/type/truefalse now pass.


http://git.moodle.org/gw?p=moodle.git;a=commit;h=2b7da6458625f93a2021ba170ef5b3a01cb53107
http://github.com/moodle/moodle/commit/2b7da6458625f93a2021ba170ef5b3a01cb53107

+ 2.1 en [behaviourbeingused,core_question]
+ 2.1 en [commentx,core_question]
+ 2.1 en [markedoutofmax,core_question]
+ 2.1 en [markoutofmax,core_question]
+ 2.1 en [previewquestion,core_question]
+ 2.1 en [questionx,core_question]
+ 2.1 en [unknownquestion,core_question]
+ 2.1 en [unknownquestioncatregory,core_question]
+ 2.1 en [xoutofmax,core_question]
+ 2.1 en [adaptive,qbehaviour_adaptive]
+ 2.1 en [gradingdetails,qbehaviour_adaptive]
+ 2.1 en [gradingdetailsadjustment,qbehaviour_adaptive]
+ 2.1 en [gradingdetailspenalty,qbehaviour_adaptive]
+ 2.1 en [adaptivenopenalty,qbehaviour_adaptivenopenalty]
+ 2.1 en [assumingcertainty,qbehaviour_deferredcbm]
+ 2.1 en [certainty1,qbehaviour_deferredcbm]
+ 2.1 en [certainty2,qbehaviour_deferredcbm]
+ 2.1 en [certainty3,qbehaviour_deferredcbm]
+ 2.1 en [deferredcbm,qbehaviour_deferredcbm]
+ 2.1 en [howcertainareyou,qbehaviour_deferredcbm]
+ 2.1 en [markadjustment,qbehaviour_deferredcbm]
+ 2.1 en [deferredfeedback,qbehaviour_deferredfeedback]
+ 2.1 en [immediatecbm,qbehaviour_immediatecbm]
+ 2.1 en [pleaseselectacertainty,qbehaviour_immediatecbm]
+ 2.1 en [immediatefeedback,qbehaviour_immediatefeedback]
+ 2.1 en [informationitem,qbehaviour_informationitem]
+ 2.1 en [seen,qbehaviour_informationitem]
+ 2.1 en [interactive,qbehaviour_interactive]
+ 2.1 en [notcomplete,qbehaviour_interactive]
+ 2.1 en [triesremaining,qbehaviour_interactive]
+ 2.1 en [tryagain,qbehaviour_interactive]
+ 2.1 en [interactivecountback,qbehaviour_interactivecountback]
+ 2.1 en [manualgraded,qbehaviour_manualgraded]
+ 2.1 en [questionusedunknownmodel,qbehaviour_missing]
+ 2.1 en [deletedquestion,qtype_missingtype]
+ 2.1 en [deletedquestiontext,qtype_missingtype]