untranslated version and moved country-related helpers to a new
FormCountryHelper helper module so that they can easily be moved to a plugin.
Updated tests accordingly.

(use first default key that resolves to a translation). this might, depending
on the backend implementation save some expensive lookups (like db lookups)

standarize on. Also, in future this place can be used for data/code that's
not literally translations but conceptually belongs to the locale (like
custom pluralization algorithms etc.).

client libraries to the backend: clients now can pass a block to
backend#populate which can contain code to load and register translations.

This makes sense for backends that persist their translations (e.g. to db)
so the repeated loading and passing of translations throughout the server
startup would be wasted resources.

because it overwrites existing translations

Fix url_for with no arguments when default_url_options is not explicitly defined. [#339 state:resolved]
Signed-off-by: NPratik Naik <pratiknaik@gmail.com>

Signed-off-by: NPratik Naik <pratiknaik@gmail.com>

Signed-off-by: NPratik Naik <pratiknaik@gmail.com>