Reverted rakefile.

Issue: Thor has already been required. This may cause Bundler to
malfunction in unexpected ways.
Removed 1.9.2 from travis.
README micro change.

Just changed title to follow all other extensions.
Add missing key to locales.

Russian locale was the only one having it.
Add locale spec.

- Locale integrity spec with i18n-spec.
- Fuubar flavorization for spec runs :)