Version 2.6.3 ready for release (with Graph)

Signed-off-by: Joseph Rézeau <moodle@rezeau.org>
Fixed missing $settings->feedbackscores check

Signed-off-by: Joseph Rézeau <moodle@rezeau.org>
Fixed email notification bug in 2.6.

Signed-off-by: Joseph Rézeau <moodle@rezeau.org>
upgraded build number to 2014010301

Signed-off-by: Joseph Rézeau <moodle@rezeau.org>
Merge branch 'MOODLE_26_STABLE' of https://github.com/sebts/moodle-mod_questionnaire into SEBTS_26