Tests green again.

Added test for grid dropdowns, but more needed.
	modified:   app/controllers/questions_controller.rb - when building new
	question, and building a nested answer, make sure the answer defaults to
	to response_class :string.  Needed to get a new question to default to the
	:string question_type.

	modified:   app/helpers/surveyor_helper.rb - uncomment reference to surveyor_helper_methods.rb in
	Surveyor.  Although this does not impact a live application, it was necessary to make tests green.

	modified:   lib/surveyor_gui/models/question_type_methods.rb - when trying to find a match on
	question_type, assume answer.response_type is :string if no answer has been built yet.  This ensures
	a match to :string question_type for freshly built questions with default data.

	modified:   spec/factories.rb - add columns.

	modified:   spec/features/create_survey_spec.rb - fix file upload

	modified:   spec/models/surveyor_gui/question_spec.rb - let :answer statements now need to set
	response_class => :answer to make test green.

	modified:   spec/models/surveyor_gui/question_type_spec.rb - pick :nones were setting display_type in
	question where they should have been setting response_class in answer.

	modified:   spec/support/surveyforms_creation_helpers.rb - commented out within for .question_type when
	choosing questions.

	modified:   spec/support/surveyforms_rearrangement_helpers.rb - added a sleep 1 before paste.

	modified:   spec/views/surveyforms/edit.html.erb_spec.rb - restructured let statements to use new
	textbox fields and added a test for grid_dropdown.