ADD: star rating widget. [7]

Author: ivan-nginx

source/css/_common/components/post/post.styl

@@ -46,3 +46,4 @@
 @import "post-reward" if hexo-config('alipay') or hexo-config('wechatpay');
 @import "post-copyright" if hexo-config('post_copyright.enable');
 @import "post-wordcount" if !hexo-config('post_wordcount.separated_meta');
+@import "post-widgets" if (hexo-config('facebook_sdk.enable') and hexo-config('facebook_sdk.like_button')) or (hexo-config('vkontakte_api.enable') and hexo-config('vkontakte_api.like')) or hexo-config('rating.enable');