Avoid errors loading/saving vector based properties
Avoid errors loading/saving QcepCalibrant*VectorProperty
Avoid errors loading/saving QcepFittedRingVectorProperty and QcepPowderPointVectorProperty
Adding QxrdFitterRingSegment - fit a point on a powder line allowing azimuth to rotate
Work on calibrants
Work on calibrants
More work on calibrants
More work on calibrants