Update types and providers to support 0.13

* Use PSON instead of JSON
* Add destroy behavior to all resources
* Deprecate rz_repo url and use iso_url
* Munge rz_repo iso_url local file path
* Deprecate rz_policy installer and use task
* rz_policy supports modification of enabled and max_count
Merge pull request #4 from nanliu/0.13

Update types and providers to support 0.13