Attributes now available for all docker daemon flags as well as system IP forwarding.

• REMOVED: container_dns* attributes (use replacement dns* attributes on daemon for all containers or docker_container dns* attributes instead)
• DEPRECATED: bind_* attributes to match docker terminology (use host attribute instead)
• Bugfix: #132: Do Not Explicitly Set storage_driver Attribute
• Bugfix: #133: Remove explicit false defaults in resources
• Bugfix: #114: Error executing action login on resource docker_registry
• Enhancement: #115: Add IP forwarding attributes
• Enhancement: #116: Docker 0.10.0: Add --no-prune to docker rmi
• Enhancement: #117: Docker 0.10.0: Add --output flag to docker save (as well as tag support)
• Enhancement: #118: Docker 0.10.0: Add --input flag to docker load
• Enhancement: #119: Docker 0.10.0: Add support for --env-file to load environment variables from files
• Enhancement: #120: Docker 0.10.0: Deprecate docker insert
• Enhancement: #123: Add docker kill --signal
• Enhancement: #124: Add all docker daemon options as attributes
• Enhancement: #125: Use dns* attributes to set docker daemon options, not defaults per-container
• Enhancement: #128: Add checksum attribute for binary downloads
• Enhancement: #126: Set long option names for specified docker daemon options
• Enhancement: #127: Use a helper function to specify single line docker daemon options