Translate yaml / properties files

[kamilbeben]

Hi, many popular frameworks handles i18n using .yaml, or .properties files.
It would be handy to be able to translate whole file at once (excluding i18n keys of course).

Example
From

production-order:
  view-name: Production order
  editor-field:
    completion-term: Completion term

production-order.view-name=Production order
production-order.editor-field.completion-term=Completion term

To

production-order:
  view-name: Zlecenie produkcyjne
  editor-field:
    completion-term: Termin realizacji

production-order.view-name=Zlecenie produkcyjne
production-order.editor-field.completion-term=Termin realizacji

If you're on board with this feature i've forked your project and created a pull request.