Bundling up capybara and its dependencies.

Capybara adds the following dependencies. You'll likely want to
remember nokogiri.
    capybara (2.1.0)
      mime-types (>= 1.16)
      nokogiri (>= 1.3.3)
      rack (>= 1.0.0)
      rack-test (>= 0.5.4)
      xpath (~> 2.0)

From http://nokogiri.org
Nokogiri (鋸) is an HTML, XML, SAX, and Reader parser. Among
Nokogiri’s many features is the ability to search documents via XPath
or CSS3 selectors.

XML is like violence - if it doesn’t solve your problems, you are not
using enough of it.

The following commands were run:
$ bundle
Adding capybara to the spec_helper

https://github.com/jnicklas/capybara#using-capybara-with-rspec
Adding the first thoughts on user signup

The describe do, it do is the foundational structure of rspec.
"Describe" provides the context in which we are running our specs.
"It" is the context for an expectation/assertion.