Adding activeadmin gem
Installing activeadmin gem

$ bundle
Installing active_admin

As I'm not using Devise (at this point), I'm skipping the users as per
the generators suggestion.

$ rails generate active_admin:install --skip-users
Migrating database for active_admin

$ rake db:migrate
Adding active admin resources
Working on administrative pages
Adding rudimentary active admin
Merge pull request #1 from ndlib/installing-active-admin

Installing active admin