Rails 3.1 Dry database.yml with development as a variable

gistfile1.txt

development: &shared
  adapter: postgresql
  enconding: utf8
  host: localhost
  pool: 5
  username: postgres
  password: postgres
  database: myapp_development

test: &test
  <<: *shared
  database: myapp_test

production:
  <<: *shared
  database: myapp_production

cucumber:
  <<: *test