Issue#4 - Use COUNTRY and LANGUAGE env vars when available
LANGUAGE env vars are available during the build, they are also set as env vars in the container, and
LANGUAGE is passed in the
--load-language argument when running Odoo.
You can look at a dummy build with these new vars here: https://git.vauxoo.com/vauxoo-dev/instance/builds/18097
Closes #4 (closed)