How to setup Capybara with Chrome
Capyabara uses Firefox by default, but I think Chrome is faster and more reliable during test. This is for Max OS X only.
Download the driver from [this location](http://code.google.com/p/chromium/downloads/list).
Copy it into a directory in your PATH
`cp ~/Downloads/chromedriver /usr/local/bin/`
`sudo cp ~/Downloads/chromedriver /opt/local/bin/`
(see comments in checklist template for more info)