Merge from vendor branch TNF:

Merge from vendor branch TNF:
Importing devel/ruby-i18n 0.4.1.

Ruby I18n

Ruby Internationalization and localization solution.

Features:

* translation and localization
* interpolation of values to translations (Ruby 1.9 compatible syntax)
* pluralization (CLDR compatible)
* customizable transliteration to ASCII
* flexible defaults
* bulk lookup
* lambdas as translation data
* custom key/scope separator
* custom exception handlers
* extensible architecture with a swappable backend

Pluggable features:

* Cache
* Pluralization: lambda pluralizers stored as translation data
* Locale fallbacks, RFC4647 compliant (optionally: RFC4646 locale validation)
* Gettext support
* Translation metadata

Alternative backends:

* Chain
* ActiveRecord (optionally: ActiveRecord::Missing and ActiveRecord::StoreProcs)
* KeyValue (uses active_support/json and cannot store procs)