DICOM/AI Examples: Added notebooks covering DICOM-SR, AI application conventions, and creating DICOMs
- Added example notebooks covering the essentials of creating PyTorch models
- Added DICOM-SR notebook walking through the components of structured reports and showing how to create, retrieve and parse report instances
- Added notebook showing how to create an AI application that generates lung segmentations, converts the annotations to DICOM, and links the images to the original CT series