The files are kept for backwards compatibility but these just contains imports
of lingua-franca versions of variables

The functions are still there providing the docstrings but calling the
lingua_franca functions.

Note, there is a INTENTIONAL addition of an inconsistence. Making the
extract_datetime return todays date instead of None as is documented.
This needs to be removed as soon as the mycroft default skills have been
added.

The functionallity of lingua franca has been verified so the language
specific test cases aren't needed anymore. The base test cases for
english for format.py and parse.py is left as long as those remain as
part of the utils module.

Switch language formatting and parsing to use Lingua Franca