0.6.1

Change --crop-size to --crop-margin: Margin around bounding box of painted stroke when crop mode triggered.

It's more reasonable to add margin around bounding box of painted stroke than fixed size. However, the results of the model on high-resolution images are still not very natural in some cases, which seems to be a limitation of the model itself.

Original	Normal Resolution(1499 × 1079) Result	High Resolution(7000 × 5039) Result. crop-margin=256