CONTRIB-4778 :: In Conditional branching questionnaire, back navigation deletes previous answers.
CONTRIB-4779 :: Do not prevent from navigating to previous page when required questions on page are left unanswered.

Signed-off-by: Joseph Rézeau <moodle@rezeau.org>
CONTRIB-4785 :: Make List of individual anonymous responses available to the teacher (again)

Signed-off-by: Joseph Rézeau <moodle@rezeau.org>
CONTRIB-4788 :: removed the GROUP BY instruction which caused an error in Postgres and was un-needed.

Signed-off-by: Joseph Rézeau <moodle@rezeau.org>
CCLE-2596 - Add UCLA UID to Questionnaire download all responses option
CCLE-3114 - OASA_Event

* Change permission type to allow public questionnaires.
CCLE-4171 - Update Questionnaire for Moodle 2.5

* Preventing "Show nonrespondents" page from displaying site/category managers.