* Add first draft from previous PR
* First draft
* Improve README and remove num_labels
* Make script more aligned with other scripts
* Improve README and apply suggestion from code review
* Change tracking to store_true
* Remove step param and use it in the log dictionary directly
* use vars(args) when passing args to init_trackers
* Include tracking tests since tensorboard is already a dep
* Fixed some bugs involving saving during epochs
* Added tests mimicking the existing examples tests
* Added in json exporting to all `no_trainer` examples for consistency