Build 415 is released.

 1. Extended DICOM heuristics for determining IsDicomFile: for the files without preamble\DCIM

2. When saving to FVX file: if a layer volume contains a slice which is fully VOID that was producing a crash.

3. Corrected saving to RAW formats (incl NII) when there re VoidVoxels and user chooses NAN as the replacement. There were numerous defects around it,

4. MainMenu>ROI>Clip Volume by ROI :corrected transparent value selection so the NAN is used to represent VOIDVOX (instead of incorrect -1 previously).

5. NIFTI Save: corrected the sform matrix calculation (to incorporate pixdim into the matrix).  Verified .NII overlay under ITK-Snap

6. Batch processing module BM2 :  corrected so the processed FVX file when reloaded is shown in the same default projection as before processing.

7. BM2 module crash is fixed.

8. Parallelize Hist64 calculation with x10+ speed increase.