Button style changed.
Update app.coffee

fix [Issue #218](https://github.com/ruby-china/ruby-china/issues/218)
Merge pull request #219 from song940/patch-1

Update app.coffee
Cell lock version.
fix typo in _error_messages
Merge pull request #220 from 046569/master

fix typo in _error_messages
Fix warn.
Remove useless cell methods, sidebar_for_node_recent_topics cache key use node_id.
1. Run callback with soft_delete. 2. Fix can not appear right status when Reply was deleted. #216 #202
Merge branch 'master' of github.com:ruby-china/ruby-china
Add test for Reply delete.
Merge remote-tracking branch 'ruby-china/master'
adfMerge remote-tracking branch 'ruby-china/master'