Rename locale files.

Signed-off-by: Nathan Lowrie <nate@finelineautomation.com>

Conflicts:
	config/locales/fr.yml
Cleaned up translations. Moved to Spree.t style translation.

Signed-off-by: Nathan Lowrie <nate@finelineautomation.com>
Merge pull request #35 from FineLineAutomation/2-0-stable

locale cleanup on 2-0-stable branch