BUG: Remove division in inner loop for otsu threshold calculator

Extracting a loop invariant constant division, should decrease the
accumulated numerical error over the loop.

Change-Id: I5c13b36ebb6b0c22494c26e85e8e6ac9720404bc
COMP: Fix implicit conversion warnings

This patch addresses the following warning:

itkThresholdMaximumConnectedComponentsImageFilter.hxx:129: warning:
passing 'double' for argument 1 to 'void
itk::BinaryThresholdImageFilter<TInputImage,
TOutputImage>::SetOutsideValue(typename TOutputImage::PixelType) [with
TInputImage = itk::Image<double, 2u>, TOutputImage =
itk::Image<unsigned char, 2u>]

Change-Id: I403f11b0eb871bf8cb2757044edd53de52943120
COMP: Remove unused typedefs in ITKReview module.

Change-Id: Ifc6aaa82f4778ce8291b1564ef4264ffd1e007dd
COMP: Remove unused FFTW typedef's.

Change-Id: I46727b780095d5fbdd0008a0b985900d8032b488
COMP: Remove unused typedefs from the Examples.

Change-Id: I01b2404eec04f8c117aa29a69c72aa1d7a843a5e
COMP: Remove unused typedefs in compatibility code.

Change-Id: I57cd8b78ae7221c677fc2d71664cdb80b9c76f23
Merge topic 'ReviewUnused'

a3247e07 COMP: Remove unused typedefs in compatibility code.
aadbd87a COMP: Remove unused typedefs from the Examples.
22b528cc COMP: Remove unused FFTW typedef's.
5afe6b74 COMP: Remove unused typedefs in ITKReview module.
Merge topic 'OtsuThresholdExtractDivision'

9c54724f BUG: Remove division in inner loop for otsu threshold calculator
Merge topic 'FixThresholdMaxCCWarning'

c1bcfb73 COMP: Fix implicit conversion warnings