Fixed compilation warning in metric file.
Changed operation NiftiInformation so that when the '-print-header' operation is used, it reads only the NiftiHeader and not the entire NiftiFile.  There is no need to read the entire file for this operation and for very large files, this operation either took a very long time or crashed.
Fix compilation error on 32-bit systems
fix bug where -zip-scene-file doesn't include the scene file
update Quazip to 0.6 (last LGPLv2 version) as an attempt at issue #1