Update Rails to 4.0.2
Feed link open with new window. Fix #239
Fix Typo
Flash 提示使用中文的句号。
Merge pull request #249 from JuanitoFatas/patch/flash-punctuation

Flash 提示使用中文的句号。
修正配置;
Merge branch 'master' of github.com:ruby-china/ruby-china
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撤销对 production.rb 的修改;
Fix #250 产品环境不要自动变异 assets 文件;
修正 deploy script, 将 assets 目录放到 shared;
Merge pull request #246 from loveky/master

Fix Typo in README.md
帖子body部分图片过大将超出padding部分，添加max-width:100%
Merge pull request #252 from JuoCode/master

帖子body部分图片过大将超出padding部分，添加max-width:100%
Fixed raw XSS attack
Fix some raw XSS in helper
Fix topic/reply body sanitize for data-floor
fix sanitize for rel target attributes
Use jbuilder for json respone, remove html_safe.