Capybara PhantomJs Poltergeist Rspec Tips

I've added a page of tips on integration (aka feature spec) testing using Capybara, PhantomJs, Poltergeist, and Rspec.

Some of the tips include:

1. Favorite test configuration (gems, spec_helper, etc.) for feature specs.
2. How to troubleshoot and debug feature specs
3. My setup for using Zeus with parallel-tests, including a rake task for setting up the databases.
4. Tricky testing:
   1. Auto-complete dropdowns (some handy utility methods).
   2. Hover effects (easy now!)
   3. AJAX

I'll try to keep this page of tips updated as my test configuration evolves.