Monk skeleton with ActiveRecord.

Thor tasks:

db:migrate          # Runs ActiveRecord migrations. If the VERSION
                    # environment variable is set, its value is used as the
                    # version to be migrated to. After the migration is
                    # complete db/schema.rb is regenerated

db:create_migration # Creates an ActiveRecord migration, takes the migration
                    # name as a parameter. The current timestamp is used as
                    # the version.

db:dump_schema      # Generates db/schema.rb