qRevert "Update Gemfile (draft.railstutorial.org)"

This reverts commit b84c797a97d66f30ebb76da6e97318466595d6a4.
Revert "Revert "Update Gemfile (draft.railstutorial.org)""

This reverts commit cda6ccee1cd5bf0e21f01a5a145e9472bd7276d7.
Revert "rails g scaffold Journey title:string body:text; Update routes: root 'journeys#index'"

This reverts commit 7b313fabb00298f01ea581f9e69d8125dcbc008b.