[Translation] Introduce the notion of regions

Extend the translation tool to understand the notion of "regions". See #129 for all details.

a. Alicia provides region locales in the tracker file (i.e. `be_fr`)
b. The tool exposes: the translation language (french) and the finale destination (`/be_fr` or `/be/fr`)
c. The tool creates the translation tasks in GLaaS using the correct locale ('fr_fr')
d. This would all be configurable in the config file.

Start by reading issue #129 and tracing the translation tool's tracker-file, configuration, and GLaaS task-creation entry points. Verify how a region locale such as be_fr should expose French and its destination, create GLaaS tasks with fr_fr, and remain configurable.

Written by the indexing model from the issue text.