adding review_comment field to respondent fixes #184
Merge remote-tracking branch 'upstream/master' into feature/Survey_stats_page
Fixed typo on detail page. Fixed bug where a PATCH would happen on
detail page load.
Actually fixed the PATCH bug this time.
You can now edit the 'review_comment' field on respondents via the
detail page.

I went with a 'timeout and then save' model for the updating.