CONTRIB-5034 :: Average rank (and average values) incorrect in N/A rate questions

Signed-off-by: Joseph Rézeau <moodle@rezeau.org>
CONTRIB-5050 :: Small bug with Oracle

Signed-off-by: Joseph Rézeau <moodle@rezeau.org>
CONTRIB-5050 :: Small bug with Oracle : removed dev echo lines!

Signed-off-by: Joseph Rézeau <moodle@rezeau.org>
CONTRIB-5078 :: Course Reset for Questionnaire does not work

Signed-off-by: Joseph Rézeau <moodle@rezeau.org>
CONTRIB-5074 :: Questionnaire: divide by zero warning

Signed-off-by: Joseph Rézeau <moodle@rezeau.org>
CONTRIB-5107 :: Report throws division by zero error if only one response

Signed-off-by: Joseph Rézeau <moodle@rezeau.org>
New version 2.6.5 (Build - 2014041801) with updated release notes and latest fixes.

Signed-off-by: Joseph Rézeau <moodle@rezeau.org>
adding SEBTS survey files
changes from @tstamp for survey summary