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.