Changed a_text(a) to a.text_for in show.html.haml, replaced text_for in question_group_methods
with same method in answer_methods, which takes three parameters,
added tests (mostly copying from other tests), and modified translation method to return hash
when question_group doesn't have questions. Also copied
split, imaged, and part_of_group? methods.
text_for in question_group partial should have three arguments. now kitchen-sink-survey should work