Adding first couple samples.
Adding sample code for listing resource types.
Adding sample code for validating templates.
Adding sample code for listing stack events.
Adding sample code for listing stack resources.
Adding sample code for listing stack resource events.
Fixing code sample.
Adding sample code for listing stack resource events.
Fixing step number.
Adding sample code for retrieving a stack.
Adding sample code for deleting a stack.
Adding sample code for listing stacks.
Use OpenStack environment variables.
Using OS_REGION instea of hardcoding DFW region.
Using OpenStack namespace instead of Rackspace namespace for the service class.
Fixing OpenStack region name environment variable name.
Fixing copy/pasta.
Using OS_AUTH_URL instead of Rackspace US auth URL constant.
Updating comment to reflect code.
Adding sample code for updating stacks.