COMP: Specify minimum set of VTKv6 libraries. Fixes #3741

The VTK utility: Utilities/Maintenance/WhatModulesVTK.py discovers
which modules are used in a project. This patch modifies the Slicer
CMakeLists.txt file to only load the vtk modules used by Slicer. This
should reduce the number of libraries being linked.

This commit also updates CTK project including a patch reducing
the number of library associated with CTKImageProcessingITKCore library.

// ----------------
$ git shortlog 48ef9aeb8..282abc7 --no-merges
Jean-Christophe Fillion-Robin (1):
      CTKImageProcessingITKCore - With ITKv4, link only to the required libraries
// ----------------

Co-authored-by: Jean-Christophe Fillion-Robin <jchris.fillionr@kitware.com>

From: Bill Lorensen <bill.lorensen@gmail.com>

git-svn-id: http://svn.slicer.org/Slicer4/trunk@23350 3bd1e089-480b-0410-8dfb-8563597acbee
COMP: SlicerExecutionModel - Update to explicitly support ITKv4

//-------------
$ git shortlog 865e2a771..ecb58ad --no-merges
Jean-Christophe Fillion-Robin (1):
      COMP: Update GenerateCLP and ModuleDescriptionParser to use ITKv4
//-------------

From: Jean-Christophe Fillion-Robin <jchris.fillionr@kitware.com>

git-svn-id: http://svn.slicer.org/Slicer4/trunk@23351 3bd1e089-480b-0410-8dfb-8563597acbee
COMP: Re-enable VTKv6 on MacOSX.

Since following commit r23350, issue #3741 is resolved, this commit
re-enables VTKv6 on MacOSX.

git-svn-id: http://svn.slicer.org/Slicer4/trunk@23352 3bd1e089-480b-0410-8dfb-8563597acbee
COMP: On MacOSX, waiting issue #3741 is *really* solved uses VTK 5.10

It turns out that the test build I initiated managed to go way beyond
the original stopping point [See r23344]. That said, there are still
the same issue when building SubjectHierarchy, Annotations module ...

This commits reverts back to VTK 5.10 for MacOSX.

The solution gonna be to continue the work initiated in [1] and
remove the top level call to "find_package()" and instead have
every Slicer libraries/modules including his set of direct dependencies.

[1] http://massmail.spl.harvard.edu/public-archives/slicer-devel/2014/015671.html

git-svn-id: http://svn.slicer.org/Slicer4/trunk@23353 3bd1e089-480b-0410-8dfb-8563597acbee