Currently the tests casks found in "/Homebrew/test/support/fixtures/cask/Casks" and "/Homebrew/test/support/fixtures/third-party/Casks" aren't included in the paths checked when running "brew cask style".
This change includes these test cask paths in the checked paths, and also includes the auto style fixes made by running `brew cask style --fix`.
Rather than trying to be smart and doing this ourselves in `brew cleanup` let’s just installed Bundler somewhere it doesn’t try to clean itself up and use `bundle install --cleanup` when we need cleanup done.
Also, use `ohai` and `odie` when possible as they look nicer.
