- Fetch Zone attribute any place where it *was* being fetched from the schema by
combination schema / provider-level attribute.
- Allow region to be unspecified if zone is specified.
- Switch one example to using provider-level zone as an example.
- Make provider-level zone optional. (Individual resources will fail if they can't find a zone.)
- Add tests for getZone and getRegion.
* govendor fetch cloud.google.com/go/bigtable
* Vendor the rest of the stuff.
* Add support for instance_type to google_bigtable_instance.
* Revendored some packages.
* Removed bad packages from vendor.json
