The app _name string is marked as non-translatable and the new_identity_item string no longer exists.

Closes #342

No more general disabling of abortOnError
Resolved all *errors* beside language ones  MissingTranslation & ImpliedQuantity
Issue context: #567

Adds first translations to source code and sets up transifex config
file. Pull more translations later with:

 cd briar-android
 tx pull --mode=developer

Closes #448