Complete refactoring of the system that was really awful (my fault!).
Now everything is in its place and working like a charm, making things really
easier to be implemented and amplied. Bug 3678
(http://moodle.org/bugs/bug.php?op=show&bugid=3678)
(http://moodle.org/mod/forum/discuss.php?d=26530)
Note: Everything is merged from stable but the quiz module because it has
other changes not merged for now. I've skyped a message to Gustav about it.
Merged from MOODLE_15_STABLE
In a lesson's settings one can now set the current lesson to be dependent on another lesson in the same course. Then, the user can set the conditions for the dependency. Currently the conditions are time spent, grade better than X, and completed (yes/no).
some important bugs. Now everything seems to work properly with
lessons and backup/restore.
Only 1 pending change: Should the answer->grade field in old backups
go to the new score field??????