Include factory_girl_rails in development env

Including FactoryGirl in the development environment ensures that
factories get created when default generators are used. Adding
FactoryGirl to development also provides factory functionality when in
the development console.
Fix SyntaxError caused by missing newline

Occured in staging and production environments

The error:

    /app/config/environments/staging.rb:1: syntax error, unexpected
    tIDENTIFIER, expecting $end
    ...ENV['EMAIL_RECIPIENTS'])require Rails.root.join('config/init..
Bump to 1.2.2

Patch version incremented for bug fix.
Remove Psych from Gemfile

The reason this was here was to resolve Bundler / Psych double loads

    `<class:Parser>': superclass mismatch for class Mark (TypeError)

https://github.com/carlhuda/bundler/issues/2068

The issue has been fixed in Rubygems >= 2.0 and Bundler >= 1.3.0, which
we should all be using now.
Switch web server from Thin to Unicorn

As the Rails application scales to more Heroku dynos, a lack of
concurrency can result in [poor performance](1) and an over-provisioning
of resources. Modifying the app to handle requests more efficiently is
a simple process with immediate benefits.

Unicorn is a [concurrent web server](2) that spawns several processes
within a single dyno without requiring concurrency or threading
awareness in your app.  Applications that migrate to Unicorn often
require fewer dynos and see increased performance.

The [config/unicorn.rb file](3) specifies the number of concurrent web
processes to run on each dyno as well as the proper forking and
termination behavior.

[1] https://blog.heroku.com/archives/2013/2/16/routing_performance_update
[2] https://blog.heroku.com/archives/2013/2/27/unicorn_rails
[3] https://devcenter.heroku.com/articles/rails-unicorn#adding-unicorn-to-your-application
Clean up Gemfile and gemspec

* Use secure RubyGems.org URL.
* Use semantic versioning on minor versions of dependencies.
* Upgrade dependencies.
Set up database before setting up RSpec

Fixes https://github.com/thoughtbot/suspenders/issues/169
Add Delayed::Job

* Use style-guide-appropriate database migration.
* Configure RSpec request specs to run jobs immediately.
* Run `Delayed::Job` workers via the `Procfile`.
* Ensure delay_jobs is reset when example fails.
Fix ActionMailer delivery method configuration

The `delivery_method` configuration line was being appended to an
existing line (which was a comment, thus no error).
Configure strong_parameters to raise in development

This brings the behavior inline with the the attr_accessible mass
assignment protection behavior in 3.2 and can help save some serious
head scratching when an action isn't working as you'd expect.
Enforce Ruby 1.9.2+ in the gemspec
Bump to 1.3.0
Fix mailer configuration
Upgrade to Aruba 0.5.2

Aruba 0.5.1 fails on Windows.
Fixed in cucumber/aruba@d5d2517
Replace custom email validator with gem
Abort RSpec runs on first failure

* Add config.fail_fast = true to spec_helper.
* Move generators config out of RSpec config method.
Upgrade to Rails 4

* Manually create .gitkeep directories. The
  `empty_directory_with_gitkeep` method is removed in Railties 4.
* Remove custom strong_parameters gem. Rails 4 includes it by default.
* Fix syntax. Syntastic reported an issue with some regular expressions.
Use New Relic RPM gem >= 3.5.7 for Heroku accuracy

http://blog.newrelic.com/2013/02/21/using-new-relic-on-heroku-read-how-our-new-ruby-agent-measures-queue-time/
Update Rails version in README.md
Test factory only if it responds to valid?

Allow Factory Girl to be used for non-ActiveRecord objects:

    FactoryGirl.define do
      factory :bundle, class: Hash do
        initialize_with do
          { test: :fail }
        end
      end
    end