[#47873133] Pull out some code from ResponsesExcelJob into decorators (called reporters here).
[#47873133] Don't print as many "YES"s as there are answers. Need to deal with MR properly.
[#47873133] Add specs for MultiChoiceQuestionReporter and QuestionReporter.
[#47873133] Extract the response metadata generation.
[#47873133] Removed the excel serialisation code accidentally in the last commit.
[#47873133] Add Multi-Record support to MultiChoiceQuestionReporter.