* 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
David Kossnick