Terrascript

Added
* Added all other providers.

Added
* Added more providers (please report any bugs)
* Added note about how to create provider modules in README.

Fixed
* Added `MANIFEST.in` which I completely forgot.
* Allow data sources without any keyword arguments.
Added
* Webserver Cluster example based on chapter 4 of "Terraform: Up and Running"

Added
* `google` provider.
* `azurerm` provider.
* `terraform` provider.
* `template` provider.
* `openstack` provider.
* `kubernetes` provider.
* `docker` provider.

* First release.
* Supports only AWS provider.