added fabrication to gemfile
bundle installed fabrication
created a user fabricator
working on fabricator still, not working
added fabrication.rb file
installed faker gem
changed to Faker::Number
created and used verified user
finished class_group_controller_spec fabrications; fabricated class_group
created fabricator for question_set
simplified child fabricator for user
put fabricated student, teacher, and class group in
fabricating questions
fabricating questions -- all subtypes
fabricated items in question set controller
refactored memberships, question sets and questions in before block
a couple more fabrication substitutions
removed commented duplication
got responses fabricated; closes #95
moved faker gem to test group