Allow for translators to translate content from the database

[alexlittle]

So these can reflect the interface lang the user is viewing in.
Two potential options (may be more):

1. Store the translations in the tag/category property ( eg name/value: "lang:es"/"espanol")
2. In the tag/category title use a json object, eg: {"en": "Spanish", "es": "Espanol"}

[alexlittle]

The function for my initial comments above are already implemented. So the question now is how we get the string for translation out/in to the db when we're passing over to the translators - assume we need some export/import method/process. Similarly for new tags etc that get added after the initial translation, we'll need to be able to pick up what has/hasn't already been translated.