Accessor changes to support object classification

See merge request rhodes/model_server!30

Separate _put arguments for query and JSON-encoded body data in test client; test case showing pydantic model is required for list args

Added option to automatically rotate patches in a nonuniform list such that height is always greater than or equal to width; this is a big data reduction for collections of elongated patches

PatchStack remembers crop boundaries of individual patches if created from list of non-matching patches

Dev multichannel classifiers

See merge request rhodes/model_server!29

Corrects both problems in issue0029

See merge request rhodes/model_server!28

Corrected error with overlapping bounding boxes, whereby a second box would overwrite a first; instead, masks are now just additive; also catch case when trying to draw contours from a mask that is a single pixel across

Bug - exporting white_channel equal zero

See merge request rhodes/model_server!27

Allow exporting of mono patches from run_exports

See merge request rhodes/model_server!26

Allow "expanded" parameter to patch exports

See merge request rhodes/model_server!25