Changed the option names to --description and --affinity-group on the storage command. This is the same options as used on other commands in the CLI (vm disk, vm image).
Merge branch 'dev' of https://github.com/WindowsAzure/azure-sdk-tools-xplat into dev-fix-options
Merge pull request #269 from fkjellberg/dev-fix-options

Changed the option names to --description and --affinity-group