If using an Ansible checkout from the devel branch, the raw module should
just work for PowerShell snippets. See examples in the integration tests (
https://github.com/ansible/ansible/blob/devel/test/integration/roles/test_win_raw/tasks/main.yml#L75
).
In 1.9.x, you may have to prefix your command with "PowerShell -Command"
for it to work.