Cloud SDK 198.0.0 is now available

[Kristen Tracey]

Hi all,

Cloud SDK 198.0.0 is now available for download at:
https://developers.google.com/cloud/sdk/

Release notes can be found here:
https://cloud.google.com/sdk/docs/release-notes

 ## 198.0.0 (2018-04-17)

### Breaking Changes

*   **(Cloud Endpoints)** Deprecated support for uploading uncompiled .proto files with `gcloud
  endpoints services deploy`. Support will be removed in a future release.

### App Engine

* Fixed a rare, intermittent bug where deployments would fail with an error
  message about "copying files to App Engine".

* Updated the Python SDK to version 1.9.69.
  Please visit the following release notes for details:
  https://cloud.google.com/appengine/docs/python/release-notes
* Added [PyTz version 2017.3](https://pypi.python.org/pypi/pytz/2017.3) to the
  built-in third-party libraries.

### BigQuery

* Added support for reauth. Reauth allows using two-factor authentication for
  end-user credentials.

### Cloud DNS

* Promoted `gcloud dns managed-zones update` to GA.

### Cloud TPU

* Added `gcloud compute tpus accelerator-types <list|describe>` to beta.

### Compute Engine

* Promoted the `--region` flag of `gcloud compute disks` and related commands to beta
* Updated `gcloud compute instances create` command to support
  blank disk creation.
* Modified `gcloud compute sign-url` to accept HTTP URLs in addition to HTTPS URLs
  for signing.
* Promoted the following Cloud CDN Signed URL commands to beta:
    *   `gcloud beta compute sign-url`
    *   `gcloud beta compute backend-buckets add-signed-url-key`
    *   `gcloud beta compute backend-buckets delete-signed-url-key`
    *   `gcloud beta compute backend-services add-signed-url-key`
    *   `gcloud beta compute backend-services delete-signed-url-key`
* Promoted `--signed-url-cache-max-age` flag to beta in the following commands:
    *   `gcloud beta compute backend-buckets create`
    *   `gcloud beta compute backend-buckets update`
    *   `gcloud beta compute backend-services create`
    *   `gcloud beta compute backend-services update`

### Firebase Test Lab

* Added `--other-files` flag to `gcloud beta firebase test android run` to support running tests with non-OBB files pushed to device.

### Kubernetes Engine

* Added `gcloud alpha container subnets list-usable` command for listing subnets
  usable for creating clusters in Google Kubernetes Engine.
* Fixed `--node-locations` of `gcloud containers clusters create` to correctly
  specify what node-pools should be created during the creation of a cluster.


Subscribe to these release notes at [https://groups.google.com/forum/#!forum/google-cloud-sdk-announce](https://groups.google.com/forum/#!forum/google-cloud-sdk-announce).

 As always, please let us know of any issues or feedback you may have via our issue tracker: <https://issuetracker.google.com/issues/new?component=187143>. You can also ask for help on Stack Overflow, under the `gcloud` tag, or in the google-cloud-dev@googlegroups.com mailing list.