Showstopper: update Node LTS version to 4.6.0
The installer wants to download the latest Node LTS version. However, due to the naming convention of the URL, it breaks every time there is a new release.
Node should fix this by having an alias that always points to the latest LTS (e.g., …/latest) but, until then, we have to keep an eye on it and update the script.
For now, manually update to 4.6.0 to fix the script.