The issue is with the Gemfile and the grouping of certain gems to also load in development environment. If they're testing gems, keep them in group :test unless absolutely necessary to move them to development, like factory_gril_rails
in example. So having,
group :test do
gem 'rspec'
gem 'rspec-rails', '~> 3.0.0.beta'
...
instead of:
group :development, :test do
gem 'rspec'
...
worked for me on my machine cloning your project. Hope this helps, give it a try.
p.s: there is also an old issue reported earlier here.
Also, I think you'll not have to require factory_girl_rails in you Gemfile like:
gem 'factory_girl_rails', require: false
And then require it in your spec_helper:
require 'factory_girl_rails'
This way you're using this gem but you don't need to require it in other places than spec_helper.rb