Merge pull request #1041 from penman/parallel_tests

.gitignore

Library/Homebrew/.simplecov

Library/Homebrew/cask/.simplecov

Library/Homebrew/cask/Gemfile

Library/Homebrew/cask/Gemfile.lock

Library/Homebrew/cask/Rakefile

Library/Homebrew/cask/cmd/brew-cask-tests.rb

Library/Homebrew/cask/test/test_helper.rb

Library/Homebrew/dev-cmd/tests.rb

Library/Homebrew/test/Gemfile

Library/Homebrew/test/Gemfile.lock

Library/Homebrew/test/Rakefile

Library/Homebrew/test/test_inreplace.rb

Library/Homebrew/test/testing_env.rb