def use(processor, options = {})
      @stack << [self.class.get_callable(processor, Roger::Release::Processors.map), options]
    end
def use(processor, options = {})
      @stack << [self.class.get_callable(processor, Roger::Release::Processors.map), options]
    end
Use a certain pre-processor

 @examples
   release.use :sprockets, sprockets_config