Augment the Error object with properties that explain details

I am catching an error and sending a response with Express + DoqmentDB like this:

```
foo.create({
foo: bar
}).then(function () {
res.json("Success");
}).catch(function (err) {
res.status(500).json(err);
});
```

The object is just:

```
[Error: Invalid value in: `foo`]
```

What I would like to see is something similar to [this section in the developers/node/design](https://www.joyent.com/developers/node/design/errors#4-augment-the--code-error--code--object-with-properties-that-explain-details) guide, where the error object is augmented with a name, message and the stack trace.

Look at the error handling in the DoqmentDB client, likely in the main module or a dedicated error file. The issue references the Joyent error design guide; start by understanding how errors are currently created and thrown. The goal is to augment error objects with properties like name, message, and stack trace, similar to the guide. Check existing tests for error handling to see the expected format and add new tests for the augmented error properties.

Scritto dal modello di indicizzazione a partire dal testo della issue.