Create user satisfaction module 

Pivotal story: https://www.pivotaltracker.com/s/projects/911874/stories/66141688

Note that this currently looks odd, with the "Is there anything wrong" link half way up the page. See the comment here: https://github.com/alphagov/spotlight/commit/25c37b383e25eb82a2a085302e9eaaeb8192e503 for a fix and a discussion of why I haven't applied it. 

Sparkline not currently implemented. Should not be difficult to add but may need design input. 

Not sure if the data is in Backdrop yet, so the Backdrop paths may need updating before deploying this.