What do you think about changing this to:

```
$ npm install
$ sudo npm install -g grunt-cli
```

I think that's what 99% of our users will need to do, versus getting an error message and then reading the Note about running as root. It's also bad advice to run the normal `$ npm install` as root, as only the `grunt-cli` actually needs it, and I bet that's what most folks would do after they read the note.