to use:
`pip install 'deeplabcut[gui]'==2.2.0.4`
What's Changed
* updated maDLC notebook! by MMathisLab in https://github.com/DeepLabCut/DeepLabCut/pull/1589
* clean up example directory by MMathisLab in https://github.com/DeepLabCut/DeepLabCut/pull/1590
* colab notebook path edit, minor fix by MMathisLab in https://github.com/DeepLabCut/DeepLabCut/pull/1591
* updated colab demo openfield by MMathisLab in https://github.com/DeepLabCut/DeepLabCut/pull/1592
* Update examples/README.md by EitanHemed in https://github.com/DeepLabCut/DeepLabCut/pull/1598
* install update by MMathisLab in https://github.com/DeepLabCut/DeepLabCut/pull/1594
* Refactor trackingutils.py by jeylau in https://github.com/DeepLabCut/DeepLabCut/pull/1576
* Default to headless when wx backend cannot be set (Importing headless even with GUI installation) by jeylau in https://github.com/DeepLabCut/DeepLabCut/pull/1597
* Minor fixes for single point tracking by jeylau in https://github.com/DeepLabCut/DeepLabCut/pull/1596
* Ignore single-keypoint assemblies during mAP evaluation by jeylau in https://github.com/DeepLabCut/DeepLabCut/pull/1566
* Better format for cross-platform labelling and training (storing triples) by jeylau in https://github.com/DeepLabCut/DeepLabCut/pull/1584
* Optionally write data on the fly to a shelf during analyze_videos (1… by AlexEMG in https://github.com/DeepLabCut/DeepLabCut/pull/1603
* Betterfunctionaltests by AlexEMG in https://github.com/DeepLabCut/DeepLabCut/pull/1604
* black formatting by AlexEMG in https://github.com/DeepLabCut/DeepLabCut/pull/1605
* Backward compatibility of training on data stored the old way by jeylau in https://github.com/DeepLabCut/DeepLabCut/pull/1611
* Update installation.md by MMathisLab in https://github.com/DeepLabCut/DeepLabCut/pull/1619
* Convert RGBA images to RGB if necessary by jeylau in https://github.com/DeepLabCut/DeepLabCut/pull/1614
* Uniform analyze_videos API by jeylau in https://github.com/DeepLabCut/DeepLabCut/pull/1567
* Remove hardcoded path separators by jeylau in https://github.com/DeepLabCut/DeepLabCut/pull/1615
* simplified 1-click maDLC analyze video, track, create video within the GUI by MMathisLab in https://github.com/DeepLabCut/DeepLabCut/pull/1621
--see PR notes, and new format: https://user-images.githubusercontent.com/28102185/146851326-23ecc001-a8b4-45e0-ad80-b42d591c1b61.png
* Ignore numerical DataFrame index by jeylau in https://github.com/DeepLabCut/DeepLabCut/pull/1622
* Update the model zoo Colab notebook by jeylau in https://github.com/DeepLabCut/DeepLabCut/pull/1616
* drop duplicate opencv (headless) by MMathisLab in https://github.com/DeepLabCut/DeepLabCut/pull/1628
* standardized imread, and Updated demo loading and modelcomparison by AlexEMG https://github.com/DeepLabCut/DeepLabCut/pull/1632
New Contributors
* EitanHemed made their first contribution in https://github.com/DeepLabCut/DeepLabCut/pull/1598
**Full Changelog**: https://github.com/DeepLabCut/DeepLabCut/compare/v2.2.0.3...v2.2.0.4