upgrade ruby 2.1.3
bundle update
use unicorn instead of passenger, because to prevent to shell-shock risk
added hatena corp.
Merge branch 'hatena'
fix md syntax
Use Ruby 2.1.3 in all environments
Merge pull request #864 from stomar/ruby-version-setting

Use Ruby 2.1.3 in all environments
Fix wrong date in news post filename
Fix wrong filename of news post (vi)
Small fixes in 2.0.0-p576 post; rewrap (vi)
Translate ConFoo posting (de)
Translate Ruby 2.2.0-preview1 release post (de)
Translate Ruby 2.0.0-p576 release post (de)
Correct Ruby version in news post (de)
Small fix in news post (en, de, fr)
Several small fixes in recent news posts (de)
Use named link reference
Remove mention of "old style" function declarations

Use the term "prototypes" or describe as "ANSI style declarations".
Small fixes on ruby-core page