Mix bugfixes.
Fixed error in display of instructor feedback.
Removed bugs due to removed fields.
Removed some dead code.
Checkpoint
minor update of research view
Ok, this is a consistent edition, where we can give feedback on reviews.
Good checkpoint.
Some changes.
Ok, this has the functionality I want for an initial release.
Removed many bugs.
Simplified the menus.  Clearer feedback now.
Merge remote-tracking branch 'github/luca' into mshavlov
migration script to key value store
fix in migration script, task.feedback was task.why_bogus