Traslate Ruby 2.2.0-preview2 Released (ko)
add vietnamese translation for 2-0-0-p598 release [vi]
Merge pull request #907 from tranvictor/vi-2-0-0-p598-is-released

add vietnamese translation for 2-0-0-p598 release
Fix news post titles in recent posts (vi)
Small fixes in recent posts (vi)
Improve installation page (en)

Provide a very short description of each of the
installation methods on the very top of the page.
Merge pull request #910 from stomar/installation-page

Improve installation page (en)
Move installation page into documentation section

* rename files
* update internal links
* add rewrite rules
Merge pull request #906 from marocchino/ko-2-2-preview2

Traslate Ruby 2.2.0-preview2 Released (ko)
Merge pull request #911 from stomar/move-installation-page

Move installation page into documentation section
Link to installation page from quickstart page (en)
Add "Installing Ruby" to documentation page (en)

Also add a link to the installation page.
Merge pull request #914 from stomar/update-documentation

Add "Installing Ruby" to documentation page (en)
Improve summary of the "Installers" section (en)

* remove duplicate information about ruby-build and ruby-install
  (they have dedicated sections by now)
* mention multiple installations
* add a note about RVM
Update Installation (ko)
Improve summary of the "Installers" section (ko)

* ref 24c27d2
Link to installation page from quickstart page (ko)

* ref c774ec1
Update Documentation (ko)
Add books link, Remove miss inputed lines (ko)
Translate 2014-11-25-ruby-2-2-0-preview2-released [vi]