Timestamps for all data received/stored

[Kmacneil0102]

JSON file should have timestamps included for all data that is received or stored (needle images, etc.)

• [x] preop/intraop segmentation
  • [x] manual/automatic
  • [x] start/end time
  • [x] userModified
• [x] registration
  • [x] start/end time

[fedorov]

+ including derived data - segmentations, registration results, etc

[che85]

for the reference: https://gist.github.com/che85/6bb9492e0e03c7ced681e0accf4a2ae0