dataloader for Semantic3D dataset

[amiltonwong]

Hi, @yanx27 ,

Thanks for releasing such useful package. As mentioned in the original paper, another dataset Semantic3D is also evaluated. Would you provide the dataloader code for Semantic3D dataset and the corresponding pipeline (such as scripts for training, prediction and mIoU evaluation)?

THX!

[abhigoku10]

@amiltonwong where you able to run on semanttic 3D