契約一覧に月別集計機能を追加
Merge branch 'develop' of https://github.com/goldrush/goldrush into develop

Conflicts:
	app/assets/stylesheets/application.css
	fixtures/develop/types.yml
	fixtures/init/types.yml
	test/fixtures/types.yml
Merge pull request #330 from qtamaki/develop

契約一覧に月別集計機能を追加