v0.1.1-beta

This release includes major changes:

1. We updated the default number of epochs to 250000/steps_per_epoch. This allows MIST to run for 250,000 optimization steps. We also validate every 250 on the entire held-out fold for cross-validation. This makes comparisons to nnUNet easier.

2. Remove the generalized dice loss (GDL), the GDL with cross-entropy loss, and remove class weights from the generalized surface loss. We have not seen any advantage to using class weights in loss functions.

3. Update documentation to include the clDice.

4. Start adding the MIST version number in the config file.