def normalize_keys(hash)
        hash.inject({}) do |options, (key, value)|
          options[(underscore(key) rescue key) || key] = normalize_value(value)
          options
        end
      end
def normalize_keys(hash)
        hash.inject({}) do |options, (key, value)|
          options[(underscore(key) rescue key) || key] = normalize_value(value)
          options
        end
      end
Translates all keys to lowercase and to a symbol
 => [:foo => "bar", ...]