associate user with applications
fix conflicts
fix db/schema.rb
Merge branch 'yo-add-authfilter-to-applications' of https://github.com/yuchan/socio_quiz into yuchan-yo-add-authfilter-to-applications

Conflicts:
	app/models/user.rb
	db/schema.rb
Merge branch 'yuchan-yo-add-authfilter-to-applications'