like,dislike実装
Merge branch 'master' of https://github.com/yudai-ushiro/six

Conflicts:
	Gemfile.lock
	db/migrate/20141122111544_create_relationships.rb
	db/migrate/20141126164713_create_relationships.rb
	db/schema.rb
Merge pull request #7 from yudai-ushiro/like_nope

Like nope