* Ported NDFI.baseline_image() and NDFI.paint_deforestation to new API.
* Factored out NDFI._paint_call() to share with Stats._paint_call().
Merge upstream EE API library apdates.
Factored out kriging calls into a single function.
Port NDFI._NDFI_image and NDFI._SMA_image_command from Java.
Clean up NDFI._MakeMosaic() and rename it to _make_mosaic;
Switch to using ee.Image rather than raw JSON in all NDFI return values.
Switch NDFI._make_mosaic() to using the API library instead of raw JSON.