Delete deployment and associated pods?

Hi,
```
const Api = require('kubernetes-client');

const deploy = new Api.Extensions({
url: 'https://SERVER:6443',
version: 'v1beta1', // Defaults to 'v1beta1'
insecureSkipTlsVerify: true,
auth: {
user: 'root',
pass: 'pass'
}
});

function print(err, result) {
console.log(JSON.stringify(err || result, null, 2));
}

// deploy.ns('fortesting').deploy('echoserver').get(print);
deploy.ns('fortesting').deploy({name: 'echoserver', qs: { PropagationPolicy: false }}).delete(print);
```
Output:
```
{
"code": 404
}
```
I can delete the deploy with 'deploy.ns('fortesting').deploy('echoserver').delete(print);` but this command cannot delete the pods, which I've created through deploy.

I've found the issue #62 , the option **orphanDependents** is depricated ([https://kubernetes.io/docs/api-reference/v1.6/#deployment-v1beta1-extensions](doc api)) it's now **PropagationPolicy**.

Start by reproducing the deletion call in the issue's JavaScript example and compare it with issue #62 and the linked Kubernetes Deployment API documentation. Check how the deployment delete options are sent and whether the callback's 404 is expected; the work is done when the documented deletion behavior correctly handles the associated pods.

Written by the indexing model from the issue text.