Incorrect use of kwargs vs self.kwargs and load_classifier

[drewoldag]

In some ResspectClassifier subclasses, we expect there to be specific kwargs provided. We use get to pull the expected keys from the kwarg dict, but then pass the **kwarg to the classifier definition as well.

This results in parameters being passed twice.

Additionally, the method to load a pretrained classifier is called load_classifier, but in database.py it is referred to as load. So we need to update the name there.