Napari-accelerated-pixel-and-object-classification

New features
* Show model statistics after training in GUI

See https://github.com/haesleinhuepf/apoc/releases/tag/0.6.5

New features
* Train probability mapper function GUI for completeness (in Plugins menu)
* Sobel of Gaussian (a.k.a. Gradient Magnitude of Gaussian) added to feature selection user interface

Bug fixes
* Applying pre-trained pixel-classifiers, object-segmenters and probabilty-mappers failed from menu

Improvements
* Slimmer user interface

Bugfix:
* object classifier couldn't be created in case the file didn't exist

New features:
* Trained classifiers can now be applied in Fiji

Backwards compatibility breaking changes
* The format the classifiers were saved in had some technical issues. The format was changed. Read more: https://github.com/haesleinhuepf/apoc/releases/tag/0.6.0