Merge pull request mahmoodlab#13 from mahmoodlab/convert

feat: image converter

Merge pull request mahmoodlab#2 from mahmoodlab/more_models

Support for additional patch encoders

Merge pull request mahmoodlab#7 from mahmoodlab/more_segmenters

Tissue vs Background segmentation

Merge pull request mahmoodlab#8 from mahmoodlab/more_tutorials

More tutorials

clear unit tests