Merging all functionality from CerebNet.utils.metrics.py into FastSurferCNN.utils.metrics.py

- Deleting CerebNet.utils.metrics.py

- refactoring usage across files

- Changing back to numpy dice score implementation

Author: taha-abdullah

CerebNet/utils/meters.py

@@ -20,7 +20,7 @@
 import torch
 
 from CerebNet.data_loader.data_utils import GRAY_MATTER, VERMIS_NAMES
-from CerebNet.utils.metrics import DiceScore, dice_score, hd, volume_similarity
+from FastSurferCNN.utils.metrics import DiceScore, dice_score, hd, volume_similarity
 from CerebNet.utils.misc import plot_confusion_matrix, plot_predictions
 from FastSurferCNN.utils import logging