providers/google: Update google_project website docs

website/source/docs/providers/google/r/google_project.html.markdown

@@ -44,6 +44,9 @@ The following arguments are supported:
 * `services` - (Optional) The services/APIs that are enabled for this project.
     For a list of available services, run `gcloud beta service-management list`
 
+* `skip_delete` - (Optional) If true, the Terraform resource can be deleted
+    without deleting the Project via the Google API.
+
 * `policy_data` - (Deprecated) This argument is no longer supported, and
     an error will be thrown if it is present. It must be replaced with a 
     `google_project_iam_policy` resource.
@@ -54,3 +57,5 @@ In addition to the arguments listed above, the following computed attributes are
 exported:
 
 * `number` - The numeric identifier of the project.
+* `policy_etag` - (Deprecated) The etag of the project's IAM policy, used to
+    determine if the IAM policy has changed.