Revert "Revert "Revert "Gemfileにtwitterを追加＋bundle install"""

This reverts commit 8e190ab13e7abbcef088dafa746d4efcad850f5e.
Revert "Revert "Gemfileにtwitterを追加＋bundle install""

This reverts commit 80f7b452afa6be6a21f5c610cd7f034ed227d36f.