support gender configuration

[amcs-echo-0]

Hello, thank you for your great work!
I’m trying to perform novel pose synthesis (animation), but I only have SMPL-X parameters for male and female models, not the neutral one.
I wonder how I could adapt these parameters to work with your project.
Do you have any suggestions or recommended approaches for handling this?
Thanks in advance!

[amcs-echo-0]

I have made the following changes:

1. Changed this line to gender="male".
2. Removed parameters with the key render.smplx_model from the checkpoint to force recomputation of all registered buffers in smplx_model.
3. Deleted dense_sample_points/40000.ply to recompute it.
4. Deleted voxel_grid/voxel_192.pth to recompute it.

Are these all the necessary changes to properly adapt the model? Or is there anything else I should modify?