def process_options options
      options = options.clone
      [:left, :right].each do |key|
        if options.key?(key) && !(options[key].nil?)
          options[key] = File.expand_path options[key]
        end
      end
      options
    end
def process_options options
      options = options.clone
      [:left, :right].each do |key|
        if options.key?(key) && !(options[key].nil?)
          options[key] = File.expand_path options[key]
        end
      end
      options
    end
Creates a new Controller

 @return [Controller] the Controller
 initialize
 Cleanup and validity checking of global options