when content is gzip compress, and page encoding is not utf8, unrecognizable characters.

use the forceUT8 options, then call the double twice decoding.

like this link:
http://cs.1010jz.com/qiuzhi/

test code.
```
var crawler = require('crawler').Crawler;

var c =  new crawler({
	"maxConnections": 10,
	"forceUTF8": true,
	"debug": true,
	"callback": function(err,result,$) {
		$("a.Linklist").each(function(index,a) {
			console.log($(a).text());
		});
	}
});

c.queue("http://cs.1010jz.com/qiuzhi/");
```