adding Russian localization
renaming files
Update translations/ru_RU/readme.md
Commit of first version of Italian translation

Translated the whole readme.md document into Italian language.
Join to contributors
Add note about the this keyword.

See https://github.com/rwldrn/idiomatic.js/issues/47 for more details.

I added three little sections :

- .bind(function() {}, this)
- _.map(function() {}, this)
- as last resort, var self = this;
fix typo.
Merge and refine `this` section contributed by @karlguillotte

Signed-off-by: Rick Waldron <waldron.rick@gmail.com>
Merge branch 'master' of https://github.com/Ragnarokkr/idiomatic.js

* 'master' of https://github.com/Ragnarokkr/idiomatic.js:
  Join to contributors
  Commit of first version of Italian translation
German translation
Merge remote-tracking branch 'upstream/master'
Finalizing draft
Finalizing draft
Finalizing draft
Finalizing draft
Finalizing draft
Finalizing draft
Finalizing draft
Finalizing draft
Finalizing draft