ENH: Packaging on MacOS is cleaner and DTIProcess branch for the Slicer extension has been merge into the trunk

*The packaging process on MacOS was copying some libraries twice while creating the package. This is not the case anymore
*Libraries that are not CLI libraries are not packaged in the cli-modules directory anymore, but in lib/slicer4-2
*DTIProcess extension was build from a specific branch from the svn repository. This branch has been merged into the trunk
Merge pull request #354 from fbudin69500/update-DTIProcess

ENH: Packaging on MacOS is cleaner and DTIProcess branch for the Slicer ...