Translator json configuration

[phlptp]

make sure the translator configuration is supported through JSON

  "translators": [
     {
       "name": "test translator",
       "source_target": name or key, (string)
       "destination_target: name or key, (string)
       "type": "JSON"
     }
  ]

[trevorhardy]

Probably need to add the "global": true/false flag to the above.

[trevorhardy]

And since we have the API, translators support the "info" field as well.

[trevorhardy]

And the source_target and destination_target can be lists, right?

[phlptp]

closed in #2560