def released?
      Supermarket.cookbook(name, version)
      true
    rescue ChefAPI::Error::HTTPNotFound
      false
    end
def released?
      Supermarket.cookbook(name, version)
      true
    rescue ChefAPI::Error::HTTPNotFound
      false
    end
Deterine if this cookbook version is released on the Supermarket

 @warn
   This is a fairly expensive operation and the result cannot be
   reliably cached!

 @return [Boolean]
   true if this cookbook at the current version exists on the community
   site, false otherwise