Added latest news posts (pt)
Update community (ko)
update about us with popularity indices (en)
Correcting translation and replacing 'Decimal' with 'Rational'
Added Ruby Stack in thirdparty tools
Added Ruby Stack in thirdparty tools. Change order.
Set canonical URL
Unify notation (ja)
s/レポジトリ/リポジトリ
Merge pull request #574 from crazymaster/master

Unify notation (ja)
Update version on ja/dev
Merge pull request #575 from crazymaster/master

Update version on ja/dev
Make download links clearly
Merge pull request #570 from makimoto/set-canonical-url

Set canonical URL
Translate news Ruby 1.9.3 will end on 2015 (pl)
upgrade ruby 2.1
update ruby 2.1.0 on travis
Extract installation steps to Installation page
Move alternative impls to about page
Merge pull request #573 from GRoguelon/master

Add the news about the end of Ruby 1.9.3 (fr)
Fix a typo on the news about the end of Ruby 1.9.3 (fr)