DOC: Fix itkSetGetDecoratedInputMacro Doxygen macro.

Extra "number" argument.  Fixes SetFileName expansion for ImageFileReader for
example.

Change-Id: Id82bcf5a04ae04d4d82bd8f362985ee19b2153ad
ENH: pygccxml v1.6.2 (reduced)

This corresponds to commit hash
  cb908d3e9faeff278d2da66149e9db59a2f62d6c
from upstream repository
  https://github.com/gccxml/pygccxml
ENH: Update pygccxml to v1.6.2

Adds python 3 support for pygccxml.

Merge branch 'pygccxml-upstream' into pygccxml-update
(See commit d4624a99ea62221f251e8e77d813289ad441d513)

Change-Id: I7259304fe5e36fa53f04a62ec279caf32612483b
STYLE: Set ITK_USE_SYTEM_ZLIB and ITK_USE_SYTEM_SZIP

instead of ZLIB_USE_EXTERNAL and SZIP_USE_EXTERNAL
The flags were set to ON and OFF instead of 1 and 0 and the description was
extended a little bit.

See ITK-3157

Change-Id: I83f1e1bc68a89d2d2b708da535125b14033141bf
ENH: Add script to update pygccxml from upstream

Change-Id: I6f8d8339e0531e49e5800d2c79423612553cdd08
BUG: Fix offset[2] in PointSetToSpatialObjectDemonsRegistrationTest.

Change-Id: I6a821304b389d3594ad8499d11a7c9487db2bce7
STYLE: Fix style in VoronoiDiagram2D.

Change-Id: If2aa30ea4868dc5b2047cc0d4b778435d96a0cfb
BUG: Fix invalid assignment of second VoronoiBoundaryOrigin.

Change-Id: Ided50dc59198e33a30ccc8791c0ecea24774a3b0
BUG: Remove unused m_{SplitEpsilon,SigmoidPrimeOffset}.

Change-Id: I6b60de093f7ee28626f30832f9eea707a8408b87
BUG: ImageSources/test/CMakeLists.txt incorrect library var reference

The CreateTestDrivers command referred to ITKSource-Test_LIBRARIES,
when the correct variable name is ITKImageSources-Test_LIBRARIES.
This was never noticed because ImageSources only depends on
header-only modules, so both the correctly-named and
incorrectly-named CMake variable would be empty.

Change-Id: I86ab2998d173d8b196575f7a5f2277444f184b45
Merge topic 'PointSetToSpatialObjectDemonsReg'

57796a2a BUG: Fix offset[2] in PointSetToSpatialObjectDemonsRegistrationTest.
Merge topic 'PointSetToSpatialObjectDemonsReg'

bd15763a STYLE: Fix style in VoronoiDiagram2D.
Merge topic 'PointSetToSpatialObjectDemonsReg'

fab08b74 BUG: Fix invalid assignment of second VoronoiBoundaryOrigin.
Merge topic 'UseSystem'

f51b3ed1 STYLE: Set ITK_USE_SYTEM_ZLIB and ITK_USE_SYTEM_SZIP
BUG: Remove unused redefinition of NULL

Change-Id: I37238a1fdb52c6d67e944fb18aa8e11dfe8efc70
Merge topic 'SplitEpsilonInitialization'

ae7e67de BUG: Remove unused m_{SplitEpsilon,SigmoidPrimeOffset}.
BUG: Fix VTKPolyDataMeshIO writing for 2D second rank tensor.

The case check was the same for 3D.

Change-Id: Icbf091068fb1aa792dd07c34d169f76dbb7d8295
Merge topic 'VTKPolyDataMeshIO2DTensor_release'

4e47b170 BUG: Fix VTKPolyDataMeshIO writing for 2D second rank tensor.
Merge topic 'pygccxml-update'

a52f78b4 ENH: Add script to update pygccxml from upstream
13e26853 ENH: Update pygccxml to v1.6.2
d4624a99 ENH: pygccxml v1.6.2 (reduced)
Merge branch 'GCCXMLBump' into release

Change-Id: I83577c4adae8c212df13757b194e79093a33a976