Fix Heroku cedar app logging with Rails 3.1 and Unicorn

heroku_unicorn_logger_fix.rb

# config/environments/production.rb

# We're on Heroku, just output straight to STDOUT
# This is required because we're using Unicorn: https://github.com/ryanb/cancan/issues/511#issuecomment-3643266
config.logger = Logger.new(STDOUT)
config.logger.level = Logger.const_get(ENV['LOG_LEVEL'] ? ENV['LOG_LEVEL'].upcase : 'INFO')