BUG: Put ImageIOBase helper function in anonymous namespace

The WriteBuffer templated helper function in this file is already in an
anonymous namespace, ReadBuffer should be too.

Change-Id: Iac2f5c944209c4433e61a928350f67691ca52c1a
BUG: Make RealTimeClock on Windows report consistent time.

The itkRealTimeClock in Windows tries to convert Windows-time stamps since
1601 to unix time since 1970. It actually does not subtract the time
difference, but adds it again, so that the time is given since 1232.

Change-Id: I6c15259362c8fb8e7516f20e9d49384d0da6d8c7
Suggested-by: Peter Fischer.
ENH: Mark ImageRegistrationHistogramPlotterTest as RUNS_LONG.

11.1 seconds on a modern machine.

Change-Id: Icc9e87cf6f52b5560c2a3b9d507dd6544f124331
BUG: Fix rounding issue with HistogramPlotter test

This patch addresses the following failing test:
http://open.cdash.org/testDetails.php?test=222652964&build=3137224

Change-Id: Id023b2dfa32e0698b06ab4413e78f8826d19fd38
COMP: Remove unused method to manage warning

This patch addressed the following warning

ImageRegistrationHistogramPlotter.cxx(242): warning #177: function
"<unnamed>::HistogramWriter::GetMetric" was declared but never
referenced
    MetricPointer GetMetric() const

Change-Id: Id2e5c4f309751d3ad65adf852f512c3d0b00dd0b
Merge topic 'FixHistogramPlotterTest'

15c7f90 BUG: Fix rounding issue with HistogramPlotter test
Merge topic 'FixUnusedGetMetricPlotter'

4be315d COMP: Remove unused method to manage warning
Merge topic 'ImageIOBase-Namespce'

4a416c2 BUG: Put ImageIOBase helper function in anonymous namespace
Merge topic 'Windows-Clock'

273c1cb BUG: Make RealTimeClock on Windows report consistent time.
DOC: ITK Software Guide Reference Label Fix

This registration example was incerrectly referencing the whole
section on deformable registration instead of the preceeding
example. These two examples had identical labels in the ITK
Software Guide chapter on registration.

Change-Id: I8603229728651d966660a5c348f8f142de1a150e
COMP: Prevent compile-time numeric warnings in Float Exception test

Place constants in external file to prevent compiler from detecting
compile-time numeric error.

Added optional ADDITIONAL_SRC argument for CreateTestDriver macro to
add src that does not contain an expected test.

Change-Id: I65a71250d2c099a0d86644e4f89973e84f261dc0
Merge topic 'FloatingPointExceptionUseExtern'

e0d1a91 COMP: Prevent compile-time numeric warnings in Float Exception test
Merge topic 'SoftwareGuideMultipleLabelLaTeXWarningFix'

4a67ec2 DOC: ITK Software Guide Reference Label Fix
Merge topic 'HistogramWriter-visibility'

eeb5338 ENH: Mark ImageRegistrationHistogramPlotterTest as RUNS_LONG.