Fully parallelized the "Volume Dynamic Averaging" function with the great speed-up.

Fixed very important defect:  it manifested as a "randomly jumping" vector ROI, when user pulls one the vector ROI handles, quite often the ROI corner would jump to position entirely different from the mouse cursor position.
Fix:  modified the VoxelInfo function, that is updating the status line when the mouse cursor moves.  Specifically call to DoEvents() (Windows function for updating the application window events) was eliminated.

Achieved final registration of PET to MPRAGE.  Result shows the registered PET, averaged over the last 100 timepoints, overlayed on the MPRAGE.


Proceeding to implement integrated registration workflow that includes automatic cropping and orientation correction (from coronal to sagittal).