Metrics dev
SemanticSegmentationMetric included : convert instance masks to semantic for semantic segmentation metrics. Semantic IoU, Accuracy and f1score included. Minor naming conventions. torch.mean -> torch.nanmean for classification metrics
SemanticSegmentationMetric included : convert instance masks to semantic for semantic segmentation metrics. Semantic IoU, Accuracy and f1score included. Minor naming conventions. torch.mean -> torch.nanmean for classification metrics