ENH: Added StatisticsRelabelImageFilterTest to testing

The itkStatisticsRelabelImageFilterTest1.cxx file has been included in the
/Modules/Filtering/LabelMap/test/CMakeLists.txt so that it can actually be
tested. A fix has been applied to the file since the feature input was not
being set. The necessary test images are also being included. Compiles and
runs fine under Windows 7, Visual Studio 10.

Change-Id: I042c8620e0cc8dde395330924fe53a20b20c724b
BUG: Fix issues with the BinaryStatisticsOpeningImageFilter test

The test missed to set one of the two required inputs (the feature image).
Besided it was not comparing to any baseline. Now a baseline image has
been added (got from the execution of the test), and a comparison to the
baseline is performed. Successful execution under Windows 7, Visual Studio
10.

An existing test for the itk::BinaryStatisticsOpeningImageFilter has been
included in the /Modules/Filtering/LabelMap/test CMakeLists. Input
arguments have also been provided. Input images have been taken from the
legacy /Testing/Data/Input repo, and copied to a local /test/Input folder.
No baseline comparison is performed yet.

Change-Id: If1d191450da23ff4d3a4f8e5ab0412353a180708
COMP: Update gccxml

Fixes the following warnings in WrapITK:
Policy CMP0048 is not set
Policy CMP0026 is not set
Policy CMP0046 is not set

See:
https://github.com/gccxml/gccxml/commit/a452067b91b890f7027f04beeea7155c1ad6b850
https://github.com/gccxml/gccxml/commit/3eb4078017ae4b95d6f69647068718a5ca890396
https://github.com/gccxml/gccxml/commit/48b49a6954310efc5a79dd1fbc55128fa9b38fb1

Change-Id: Id5e53208110298317129be52815422d752b22703
COMP: Constructor initialize list improvement

Do not perform polymorphic class before this object is
constructed. Use Superclass::GetMeasurementVectorSize, as the parent
is already constructed at this point.

Thanks to Brad L for this fix.

Change-Id: I8267076cb5adfbae093d838b2eee68aec44a96aa
Merge topic 'BumpGCCXML'

621904fa COMP: Update gccxml
Merge topic 'BinaryShapeOpeningImageFilterCodeCoverage'

7cdd4596 BUG: Fix issues with the BinaryStatisticsOpeningImageFilter test
COMP: Type warnings in constructors

Some initializations used the wrong types.

Change-Id: I348276e117c14be183f6cf00be814fbfc0dad556
BUG: Add support for signed char output

This patch addresses the following JIRA ticket:
https://issues.itk.org/jira/browse/SIMPLEITK-393

The types "char", "signed char" and "unsigned char" are distinct
intrinsic types. And char may be signed or unsigned. It has been
generally assumed that ImageIOBase::CHAR refers to a signed
type. To support writing of "int8_t" types, the correct typemap has
been added.

Change-Id: If4afaf277cf98d83d9a007b122631ab2aea4a647
Merge topic 'HistogramConstructor'

81dc82f3 COMP: Constructor initialize list improvement
Merge topic 'ConstructorWarnings'

ddcea070 COMP: Type warnings in constructors
BUG: Use NewMacro for Clone with TimeVaryingVElocityFieldTransforms

The parents superclass' clone method was used resulting in Clone
method different then the Self type.

Change-Id: I50492ade82d5b0bd37d293bbe771f20511d433a8
Merge topic 'UseNewMacroForClone'

f49605bd BUG: Use NewMacro for Clone with TimeVaryingVElocityFieldTransforms
BUG: Copy/paste error

Coverity reports:

CID 1080814 (1 of 1): Copy-paste error (COPY_PASTE_ERROR)
copy_paste_error: "it" in "it" looks like a copy-paste error. Should it say "it2" instead?

Change-Id: I40cbe342f3330b8043febb3b8ecc298189adc34e
Merge topic 'Coverity_CutPasteError'

ac523125 BUG: Copy/paste error
Merge topic 'StatisticsRelabelImageFilterCodeCoverage'

d83a3907 ENH: Added StatisticsRelabelImageFilterTest to testing
Merge topic 'OptionalSupportSignedCharImageIO'

70c8a7da BUG: Add support for signed char output
COMP: Arguments of wrong type

Double was passed for unsigned char argument.

Change-Id: I65e7efa555330562df3e5ace91c7d8a62462a5c7
Merge topic 'MeshTestWarnings'

0b40f0e5 COMP: Arguments of wrong type