Add support for HTML5 <figure>
1.11.1
1.Support for HTML5 <img> buried in <figure>
2.Add support positive_classes for readability.py. You can use it to find back missing part of original HTML article.
3.Add support for minimum image size.Some imge are useless like 1x1.gif.It effect thumbnail looking.
zh_cn
1.支持解析HMTL5的figure包含的图片
2.支持兴趣关键词，可以用于保留文章某些被readabilty.py删掉的部分。
3.支持最小图片大小。某些网站会在文章正文中加入1x1.gif的水印图片，不仅无用而且干扰thumbnail，一张1*1图片被放大到150*150……
1.11.2
A separate cover image for a bound volume
合订本单独设置封面
1.11.2
A separate cover image for a bound volume
合订本单独设置封面
Merge pull request #62 from rexdf/master

Support HTML5 <figure> img && minimum image size && positive keywords