change textExtractor to extractor to support object as return value

[koshuang]

With extract method, we can return a nested JSON object. e.g.

$('table').tableToJSON({
  extractor : {
    0 : function(cellIndex, $cell) {
      return {
        name: $cell.find('em').text(),
        avatar: $cell.find('img').attr('src')
      };
    },
    1 : function(cellIndex, $cell) {
      return $cell.find('span').text();
    }
  }
});

[koshuang]

@lightswitch05 got it, I will update the PR soon, thanks for your response. :)

[koshuang]

@lightswitch05 I've update the the PR, could you review again? thanks!

[lightswitch05]

Thanks for your contribution!

[lightswitch05]

Included in 0.12.0

[koshuang]

thanks @lightswitch05 , would you mind pushing 0.12.0 to npm?

[lightswitch05]

@koshuang that totally slipped my mind. Its published now, sorry about the wait!

[koshuang]

@lightswitch05 great, thanks :)