Using during Hartl rails 4.0 guide (http://ruby.railstutorial.org/chapters)
group :development, :test
gem 'guard-rspec'
gem 'guard-livereload'
gem 'spork-rails', github: 'sporkrb/spork-rails' # RubyGems.org nog uptodate
gem 'guard-spork'
gem 'childprocess'