Complete changes suggested by [UpgradingToRails ch 2](https://github.com/alindeman/upgradingtorails4/blob/master/text/02_before_you_upgrade.markdown)
* remove `config.whiny.nil` options
* `update_attributes` (soft deprecated) => `update`
Complete changes suggested by [UpgradingToRails chs. 3- 70](https://github.com/alindeman/upgradingtorails4/blob/master/text)
* enable performance tests by installing "rails-perftest" and "ruby-prof" gems
Complete changes suggested by [UpgradingToRails ch. 70](https://github.com/alindeman/upgradingtorails4/blob/master/text/75_testing.markdown)
* move tests to Rails 4 conventional locations:
  * test/unit/helper => test/helper
  * test/unit => test/models
  * created directory test/mailer
  * moved mailer tests from test/model (formerly test/unit) to test/mailer