Merge pull request #4072 from reitermarkus/cask-refactoring

Library/Homebrew/cask/lib/hbc.rb

Library/Homebrew/cask/lib/hbc/cask.rb

Library/Homebrew/cask/lib/hbc/caskroom.rb

Library/Homebrew/cask/lib/hbc/cli/audit.rb

Library/Homebrew/cask/lib/hbc/cli/info.rb

Library/Homebrew/cask/lib/hbc/cli/internal_stanza.rb

Library/Homebrew/cask/lib/hbc/cli/list.rb

Library/Homebrew/cask/lib/hbc/cli/outdated.rb

Library/Homebrew/cask/lib/hbc/cli/search.rb

Library/Homebrew/cask/lib/hbc/cli/style.rb

Library/Homebrew/cask/lib/hbc/cli/upgrade.rb

Library/Homebrew/cask/lib/hbc/macos.rb

Library/Homebrew/cask/lib/hbc/qualified_token.rb

Library/Homebrew/cask/lib/hbc/scopes.rb

Library/Homebrew/cask/lib/hbc/utils.rb

Library/Homebrew/test/cask/artifact/generic_artifact_spec.rb

...ry/Homebrew/test/cask/artifact/two_apps_incorrect_spec.rb

Library/Homebrew/test/cask/cask_spec.rb

Library/Homebrew/test/cask/cli/audit_spec.rb

Library/Homebrew/test/cask/cli/style_spec.rb