Re-factor Questions

[johnjosephhorton]

Re-factor Questions

[apostolosfilippas]

Some more things @johnjosephhorton

• It'd be nice to add integration tests for each of the questions that we support.
• QuestionFunctional and Question.__add__ need work
• We should be always allowing both {'answer': 1} and {'answer':'1'} to go through
• Allowing non-responses at the question level feels kind of weird atm. Either allow it and demand all questions to have it, or do it at some other level (survey?)
• The way i've implemented it, 'comment' is always optional, in that answer validation will go through even if it is missing. We should get consistent here.

Nice to haves:

• descriptors could be made DRYer/better
• answer validation could be made DRYer/better

[johnjosephhorton]

I'm going to close this issue and create a new consolidated issue, as most have been addressed.