DOC: Doxygen expansion of itkGetModifiableObjectMacro.

Also fix bug in Doxygen definition of itkGetConstObjectMacro. (not listed as
const).

Change-Id: Ic7ade94a71d825f815f2de29ea8b11dc79f4a5a2
ENH: Remove unused wrapping code. ITK-3032.

The ExternalProjects/{ItkVtkGlue,PyBuffer} is left over from the
WrapITK project integration and is not used.  It is removed in this commit.

The ItkVtkGlue code has been migrated to the wrapping directory in the ITKVtkGlue module
and the PyBuffer is available as an External module here:

  https://github.com/tobiasmaier/itkPyBuffer

Change-Id: I0b0452667157c5c1d8f9c5892a45fe60f8320db2
COMP: fix unused result warning in ProcessObject

This patch fixes the following warning:

ITK/Modules/Core/Common/src/itkProcessObject.cxx:797:67: warning:
expression result unused [-Wunused-value]
  m_Inputs.insert( DataObjectPointerMap::value_type(name, NULL) ).first;

Change-Id: Idc5d4c9368a02b52ef5bf5ad0071ead00b2504c4
DOC: Updated input methods doxygen

Reordered protected methods in ProcessObject header into 3 groups,
Input, Output, and Pipeline methods.

Change-Id: I220f26086a3a065e1f235a060987931fde825b78
ENH: Use named inputs in BinaryReconstruction filters.

The named input ProcessObject functionality is put to use for the MarkerImage
and MaskImage in a backwards compatible way.

Change-Id: I06afdea17381b49abcc4d8be1183e42cae866558
Merge topic 'FixProcessObjectUnusedResultWarning'

643dd16 COMP: fix unused result warning in ProcessObject
COMP: Another baseline

For Ubuntu

Change-Id: I1910ebe91fb2b2930b979d29f1c0b400589039af
Merge topic 'UnusedWrapping'

c12ee17 ENH: Remove unused wrapping code. ITK-3032.
Merge topic 'QuickViewTestBaselines_1'

7abe33a COMP: Another baseline
Merge topic 'NamedInputsCompatibility'

6ac3fcd ENH: Use named inputs in BinaryReconstruction filters.
e94e30f DOC: Updated input methods doxygen
Merge topic 'ModifiableObjectMacro3'

6f1c432 DOC: Doxygen expansion of itkGetModifiableObjectMacro.