improves visibility on windows

Before:

![image](https://cloud.githubusercontent.com/assets/383994/3371333/fd804eae-fb9e-11e3-971e-822f426204dd.png)

After:

![image](https://cloud.githubusercontent.com/assets/383994/3371339/14baed68-fb9f-11e3-9617-242115c34f12.png)

I use mac and windows. This makes it a little easier to bear when using windows lol.
Oh, sorry, it was just a bad joke. It would quit the process if Windows :p

```
(process.platform === 'win32' ? chalk.cyan(err.reason) : chalk.blue(err.reason))
```

is fine.