What's new in this release
* Support exporting QONNX from QKeras (28 )
* Support exporting QONNX from HAWQ (41)
* Tensor attributes in custom op wrappers (24)
* Use knowledge of weight matrices to further optimize accumulator range calculation (29)
* Support spatial -> channel rebalancing for certain convolutional kernels (22)
* Numerous bugfixes and other improvements - [see full list of merged PRs for this release](https://github.com/fastmachinelearning/qonnx/milestone/2?closed=1)