Adds a cache of all versions available on nodejs.org using simple empty files as placeholders. When a new version is installed, it will replace the placeholder with a directory. This makes it easier for users to see what versions are available for install, and what the latest and stable versions are.
directory you are in. Don't define START unless we need to. (Thanks cgcardona) Change-Id: I256a4db0af9b40b64bc0fe8d6e393f614132db68