Fix #128 Opera 和 IE9 无法发帖
Merge pull request #131 from xiaods/master

FIX: update travis build script,keep it test green
Merge pull request #129 from yesmeck/master

修正 Opera 和 IE9 无法发帖
1. 1个月以前创建的帖子，有新回复的时候不再往前面顶了。 #125;
2. 改用 last_active_mark 代替 replied_at 的排序;
修复API源码链接

API的源代码地址已经改变，然而http://ruby-china.com/api上的相应链接并未更新
Add API v2.
Merge pull request #132 from yandy/patch-1

修复API源码链接
API v2 小调整;
fix comment spell error
Merge pull request #133 from windy/fix_comment_spell_error

fix comment spell error
Update social-share-button.
Merge branch 'master' of github.com:ruby-china/ruby-china
Retina support for go_top, rss icon.
Retina support for small icons and logo.
Retina support for User avatar.
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API update.
Use 404.html from html5-boilerplate

Use Google fixurl service to provide suggestions and search box.

refs http://ruby-china.org/topics/7960
reproduce #63
use attr to fetch string may having leading zero