Improved Segmentations with Model 550
- bug fix in averaging multiple anatomical images of the same modality (T1w or T2w) in prebibsnet
- addition of model 550 (new T1w and T2w bibsnet model) to model.csv, allowing the application to run model 550 in the bibsnet stage
- removal of model 512 to save space in the container, replaced with model 550
- changed model 512 to model 550 in the readme