Train with more than 17 keypoints

[Darkaido]

Hii, i want to train movenet with more than 17 keypoints. so what changes i have to do for training.

[fire717]

Hi, maybe you should do this:

1. change data generate script: scripts/make_coco_data_17keypooints.py to your number
2. change model head structure, such as output channel number, etc.
3. change the way how loss computed
4. also be careful to some data aware augmentation, like issue36