Fix typos (pt)
Restore old news post

Fix old post with links to conference material:

* restore links in 'ja' version by adopting the external links from 'en'
* fix broken markdown and content in 'en', 'de', and 'ko' versions
  (which have already been broken on the Radiant CMS site);
  missing content and links were taken from an archived page
Fix links in old news post
Translate latest news (pl)
Merge branch 'fix-links'
Fix broken link markdown in old news post
Create 2014-12-18-ruby-2-2-0-rc1-released.md

This is still draft.
use real URLs
apply comments

Thank you for review!
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.