BUG: Fix segfault from integer overflow in NIFTI reader

The type unsigned int was used for the size of an image this could
overflown for large images and cause a segfault. Specifically, this is
for vector images.  This type has been changed to size_t to ensure
that the in memory image's size can be computed.

A test was added to write a VectorImage of 3 components for a 6GB
file. This test is conditional on the computer having 12GB of memory.

Fix Segfault with Redhat's gcc 4.4.6, in NiftiImageIOTest, due to some
type of optimization bug in MakeNifiImage utility method.

Change-Id: I3e2c9d2f2c134ea1a379f188155763fed54bab1d
STYLE: Make round consistent in ITK.

Based on https://itk.icts.uiowa.edu/jira/browse/ITK-2811 make use
of rounding in ITK consistent across entire platform.

Change-Id: I1c17e54c1db5112cafb20518407b5f350d2001db
PERF: speed up patch-based denoising tests

Reduce number of iterations and number of patch comparisons to speed
up tests.  Also reduced number of threads to 2, so that multithreaded
pathways are still exercised, but works on more system configurations.

Change-Id: Ife22a42067d295ae9d5de2996ba97e1ac48abe18
PERF: hoist computation of norm outside Evaluate method.

Change-Id: I9a81d9f797e5d607e000cf6b5feffcaf741c247b
STYLE: Fix according to KWstyle

Recent change to remove itk::GetImageDimension caused alignment
issues.

Change-Id: Ia4ee82195609124276a6cb6e621b719e70787684
BUG: disable wrapping of Toboggan filter for win 64

When on win64 with 64-bit IDs are turned on, the output image type is
of type long long, this image type not wrapped and causes error,
therefore Watershed and related Toboggan filters are not wrapped
either.

Change-Id: Iba6ed7f850127ab9391b2c321ab44b99a543f9ba
Merge topic 'FixNiftiBigVectorImage'

135102e BUG: Fix segfault from integer overflow in NIFTI reader
Merge topic 'KWStyle_1'

43d6fd2 STYLE: Fix according to KWstyle
Merge topic 'FixWin64TobogganWrapping'

2f853cf BUG: disable wrapping of Toboggan filter for win 64
Merge topic 'FasterDenoisingTests'

0adb00e PERF: speed up patch-based denoising tests
Merge topic 'FiniteCylinderFunctionPerfFix'

8a5c9d2 PERF: hoist computation of norm outside Evaluate method.
Merge topic 'ITK-2811_ConsistentMathRound'

ff7f2cc STYLE: Make round consistent in ITK.