db/seed.rbがサマソニ専用だったのを汎用化した
modified:   db/seeds.rb
アイキャッチ画像を使わない
グレーのボックスを白に変更
precompile実行
new file:   public/assets/application-9e52c492490d144ad0af871ba0bf7ed7.css
new file:   public/assets/application-9e52c492490d144ad0af871ba0bf7ed7.css.gz
modified:   public/assets/manifest-7592299a8d46bf5bde18af4d24c608ff.json
Merge branch 'master' into modify-seed-for-a-nation

Conflicts:
	public/assets/manifest-7592299a8d46bf5bde18af4d24c608ff.json
Merge pull request #162 from i-d-e-a-t/modify-seed-for-a-nation

db/seed.rbがサマソニ専用だったのを汎用化した