Translations and styling on admin pages for posts and uploads

Moved to Spree 2.0 translations. Translations in this extension are a mess at the moment.

Signed-off-by: Nathan Lowrie <nate@finelineautomation.com>
Get frontend views working.

Signed-off-by: Nathan Lowrie <nate@finelineautomation.com>
Finished admin view translation migration to Spree.t form

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