BUG: Update ITKv4 to include fixes for TIFF Reader/Writer

$ git shortlog 56fae27..8012ade --no-merges
Bradley Lowekamp (22):
ENH: Extract TiffReaderInternal to separate file
ENH: Refactor ReadTwoSamplePerPixelImage into template function
ENH: Refactor GenericReadImage into template function
BUG: Remove Zeiss 2-channel support code in TIFFImageIO ( and LSMImageIO )
ENH: Refactor method to convert RGBA image to output buffer
ENH: Refactor duplicated code to read a page
BUG: Fix right oriented tiff images
BUG: Remove dead separated plannar code, add test
STYLE: Fix minor kwstyle defects in test and test results
BUG: Use array delete operator for array new allocations
ENH: add arbitrary TIFF TAGs to meta-data dictionary
ENH: Reduce code duplicate in TIFFImageIO::ReadCurrentPage
BUG: Address Coverity warning about null pointer dereferences
ENH: Remove support for TIFF tile as 3D and dead code
ENH: RGBA read images should stay unchanged.
ENH: Refactor per pixel conversion function to per scan-line method
PERF: Refactor color table lookup
BUG: Adding missing parentheses around boolean expression
ENH: adding TIFFImageIO test for RGB palette images
ENH: Query libtiff to determine compression support
BUG: Support TIFF tiled image with TIFFReadRGBAImage
COMP: Add explicit conversion to const char

Matthew McCormick (1):
COMP: Do not use _stat64 with MinGW-32.

Richard Beare (1):
ENH: Include TIFF tags in the MetaDataDictionary

From: Bradley Lowekamp <blowekamp@mail.nih.gov>

git-svn-id: http://svn.slicer.org/Slicer4/trunk@23797 3bd1e089-480b-0410-8dfb-8563597acbee