Added QAs regarding localized versions and auto-updated applications.
closes #3954
global replace of: 'phinze/homebrew-cask' -> 'caskroom/homebrew-cask' 'phinze/cask' -> 'caskroom/cask' 'phinze/homebrew-testcasks' -> 'caskroom/homebrew-testcasks' and various other specific places that needed updates <3 the homebrew-cask community!
This doc currently has very little content. Also fix link text for other content in the doc directory.