Some major additional features since open source:

• Add TensorMask and PointRend in projects/.
• Support exporting models to caffe2 format.
• detectron2.model_zoo APIs.
• Support training with segmentation annotations in binary mask format.
• Support evaluating COCO-style AP for datasets in custom format.

We start to provide pre-built binary wheels at https://dl.fbaipublicfiles.com/detectron2/wheels/index.html. The pre-built wheels for this version have to be used with an official binary release of PyTorch 1.4.