introduce the active_admin
respond to #20
activeadmin の CSS がアプリ全体に適用される問題を修正 (#18)
Comments of ActiveAdmin are not now shown
Fix comment
Modify constants to methods
Cosmetic change
bundle update
Update ruby to 2.1.2
Introduce debug tools
Remove version specification
Remove needless descriptions
Clean up Gemfile
Specify devise explicitly
Set next_deletion_detection_at before create

With cosmetic changes
Add Video to active_admin resources
Rename to SeiyokuSokuho
Merge pull request #29 from iceEiji/feature/active_admin

Conflicts:
	app/views/layouts/application.html.slim
	config/routes.rb