Does not compile

None of the examples currently work. The error is from the connection line:

```GO
client := documentdb.New("connection-url", documentdb.Config{"master-key"})
```

`cannot use "master-key" (type string) as type *documentdb.Key in field value`

Shouldn't we be passing a `*documentdb.Key` instead of string?

Look at the documentdb package's New function signature and the Key type definition. The example code passes a string where a *documentdb.Key is expected. Check the package's documentation or source to see how to create a Key. The fix likely involves updating the example to use documentdb.NewKey or a similar constructor. Verify by trying to compile the corrected example.

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