Updated README.md file to use template.
Updated README.md file to use the new template.
Updated wadl for v2 to fix double parm tree showing for create stack request.
V2 API updates

- Updated distro calls with more details
- Changes to the cluster request/response, added keypair_name and
  made stack_id and node_groups top level.
- Changed flavor to flavor_id where it's referenced in stacks and clusters
- Added links to all resources