Create 2014-12-18-ruby-2-2-0-rc1-released.md

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use real URLs
apply comments

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additional fixes
Merge pull request #919 from nurse/ruby-2.2.0-rc1

Create 2014-12-18-ruby-2-2-0-rc1-released.md
update rake 10.4.2
s/preview2/rc1/g
Merge pull request #920 from ruby/fix-wrong-ver

s/preview2/rc1/g
Fixed typo in 2014-12-18-ruby-2-2-0-rc1-released.md (en)
Translate recently updated old posts (ko)
Translate ruby 2.2.0-rc1 released (ko)
Fix Rails blog link in 2.2.0-rc1 release post.
Fix link (ref #925)
Merge pull request #925 from JuanitoFatas/fix/doc-link

Fix Rails blog link in 2.2.0-rc1 release post.
Merge pull request #923 from gmitrev/news-ruby-2-2-0-rc1-en-typo

Fixed typo in 2014-12-18-ruby-2-2-0-rc1-released.md (en)
Translate 2.2.0-rc1 release post (zh_tw).
Merge pull request #924 from marocchino/ko-2-2-rc1

Translate ruby 2.2.0-rc1 released (ko)
Remove trailing whitespace