some change
Changes to be committed:
	modified:   app/assets/javascripts/application.js
	modified:   app/assets/stylesheets/application.css.scss
	modified:   app/assets/stylesheets/submissions_new.css.scss
	modified:   app/assets/stylesheets/submissions_show.css.scss
	modified:   app/controllers/submissions_controller.rb
	modified:   app/models/submission.rb
	modified:   app/views/submissions/_new.erb
	modified:   app/views/submissions/edit.html.erb
	modified:   app/views/submissions/show.html.erb
	modified:   app/views/users/_show.html.erb
	modified:   db/migrate/20141101161308_create_submissions.rb