put the default type back, otherwise the validator won't notice these fields
allow further suggestions even when you've suggested an answer

This is not quite the right fix yet, because unless the question
allows multiple answers you're only supposed to be able to make a
single suggestion. However, this is better until I can fix the bug
that prevents you from editing your existing suggestion.

Also removes the duplication between AHJ_cqa.jinja and
AHJ_cqa_qa.jinja. They were both rendering the question and its
answers, but all of the code was duplicated. I moved the appropriate
content from AHJ_cqa.jinja to AHJ_cqa_qa.jinja (as it had been
rewritten there) and made the former include the latter. I also
changed AHJ.py to set the values the new template code requires.

Fixes #121 and #127