Fix typo in page
因為 Mongoid::Search.classes 有 bug，抓不到所有的 classes
故使用手動指定 class 的方式 index
apply cancan rescue
不需預先寫死 language type，沒有就是吐 text
Merge branch 'master' of github.com:rubytaiwan/ruby-taiwan
Merge pull request #110 from rubytaiwan/master

fix language type
fixed missing time in posts list
fix typo
add tabindex at reply form, closes #35
Fix layout in topics form
Merge pull request #36 from hSATAC/master

回應可用 tab+enter 送出
Merge pull request #113 from rubytaiwan/master

也支援一般人用的 tab - index
page_path 應該要吃 slug
hotfix for issue#111 just a workaround
posts textarea autogrow
require autogrow in posts.coffee
在 Development 不要 render_optional_error_file, 很煩 -_-
Merge remote-tracking branch 'upstream/master'
Merge pull request #116 from rubytaiwan/master

在 Development 環境不要 rescue_error
Add node-specific rss feeds. Close gh-27.