fix issue #20 for dealing with Chinese correctly

If we change the code of ViewReview.php at line 272 from

> $sourceDom->loadHTML('<?xml encoding="UTF-8">' . $code);

to

> $sourceDom->loadHTML('<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>' . $code);

It will be correct.

Otherwise all Chinese characters are appeared as messy code in results.