Ruby 2.2.0

Created by: chulkilee

The current versions of following gems cannot be compiled. Updating them to the latest resolves the issue.

• kgio: used by unicorn. ChangeLog
• raindrops: used by unicorn. ChangeLog
• eventmachine: used by thin, tinder, twitter-stream. CHANGELOG

The current versions of following gems show warnings.

• fog
• org-ruby

I didn't update fog since it seems to have big changes in gem - the latest version of fog is now separated into fog-core and other gems.

It is running well without problem - I haven't tested features by tinder / twitter-stream.