* Make name and version properties required
* Warn before deleting files in checkpoint directory
* Get default checkpoint path from any logger
* Fix typos
* Uncomment logger tests
* Whitespace
* Update callback_config_mixin.py
checkpoints and version file names would just have a number. it's easy to tell what you're looking at with version_ prepended
* Address comments
* Fix broken tests
* early stopping callback is not default
* added a default logger
* added default checkpoint callback
* added default checkpoint/loggers
* added default checkpoint/loggers
* updated docs
* cleaned demos
* cleaned demos
* cleaned demos
* clean up docs around loggers
* clean up docs around loggers
* clean up docs around loggers
* clean up docs around loggers
* clean up docs around loggers
* clean up docs around loggers
* clean up docs around loggers
* clean up docs around loggers
* clean up docs around loggers
* clean up docs around loggers
* clean up docs around loggers
* clean up docs around loggers
* clean up docs around loggers
Jirka Borovec