Merge pull request #196 from gazay/ru-translation

Complete initial files for :ru branch (ru)
Remove code example for disabled javascript (ru)
Translate about pages (ru)
Merge pull request #197 from gazay/ru-translation-about

Translate about pages (ru)
Fix typo
Translate community pages (ru)
Merge pull request #198 from gazay/ru-translation-community

Translate community pages (ru)
Translate most of the documentation pages (ru)

* index.md
* quickstart
* success-stories
Translate ruby-from-other-languages (ru)
Fix typos in ruby-from-other-languages (ru)
Rename to-ruby-from-c-and-c- to to-ruby-from-c-and-cpp (ru)
Adapt mailing list instructions to GNU Mailman (ru)
Add reference to qtbindings on 'to-ruby-from-java' (ru)