Fixed a bug where questionnaires with no human_readable_question or human_readable_answer would throw an exception
(cherry picked from commit 68b2a08)
Changed the way uniqueness is calculcated. Also fixed a bug where mysql_wrapper wouldn't log correctly.
(cherry picked from commit 58bb014)
Changed logging level to debug.
(cherry picked from commit 6bb82ad)
Added log file for migration
(cherry picked from commit 00b5b26)