Thanks.  Unfortunately, the rspec-rails generator makes `spec_helper.rb` load the entire rails app, which is directly against the advice here.  We should do something to solve this apparent contradiction.  Two ideas:

* Keep this, but have rspec-rails generate a `rails_spec_helper.rb` file that requires `spec_helper.rb` and adds the rails-specific stuff.  Then users can require `rails_spec_helper` from their files that are meant to integrate with rails and `spec_helper` for stand-alone ruby objects.
* Rename this file to `unit_spec_helper` (or `base_spec_helper`).

@alindeman -- any thoughts?  I think it'd be good to have new projects start with defaults that encourage folks to be more intentional about integrating with rails.