add view for question item

Signed-off-by: RyanZhu <troyzx1024@gmail.com>
add question create action

Signed-off-by: RyanZhu <troyzx1024@gmail.com>
Merge branch 'master' of https://github.com/RyanZhu1024/eng_learn

Signed-off-by: RyanZhu <troyzx1024@gmail.com>

Conflicts:
	app/controllers/question_item_controller.rb
	app/controllers/reading_article_controller.rb
	app/views/question_item/new.html.erb
	app/views/reading_article/new.html.erb