Configure the test suite.

Sets up the RSpec test suite so that it performs as desired.

    - The file 'spec_helper.rb' was stripped of much of the default
      content, particularly comments, and desired options were added in.
    - Unnecessary comments in 'rails_helper.rb' were weeded out to make
      the code more readable.
    - The file '.rspec' was edited to make test presentation more helpful.
    - The folders 'controllers', 'factories', 'fixtures', 'helpers',
      'integration', 'mailers', 'models', and 'requests' were added
      to the folder 'spec' for potential future use.
    $ git add .
    $ git commit -F commit-message.txt
    $ git push origin master