Ruby 2.1.1 is released
fix typos
add introduction to Ruby 2.1
Add news post for Release 2.0.0-p451.
fix a typo (ticket -> tickets).
fix a typo.
Merge pull request #645 from nurse/release-v2.1.1

Ruby 2.1.1 is released
Merge pull request #646 from nagachika/release_2_0_0_p451

Add news post for Release 2.0.0-p451.
syntax
Fix typo
Merge pull request #647 from Agis-/patch-1

Fix typo
Translate Ruby 2.0.0-p451 is released (de)
Translate Ruby 2.1.1 is released (de)
Update stable version to 2.1.1
Update previous and previous19 versions
Translate Ruby 1.9.3-p545 is released (ko)
Translate 2.1.1 is released (zh_tw).
Translate 2.0.0-p451 is released (zh_tw).
Translate 1.9.3-p545 is released (zh_tw).
Merge pull request #648 from JuanitoFatas/release-news-tw

Translate 1.9.3-p545, 2.0.0-p451, 2.1.1 is released (zh_tw).