DOC: Fix description of SpatialObject::GetBoundingBox()

Change-Id: I0bbc0e3a9711651b1e0ef98544c44d94b2726f65
COMP: Use latex formula for HoughTransform doxygen.

The std:: prefix causes a warning:

  Generating docs for compound
  itk:/.../ITK/Modules/Filtering/ImageFeature/include/itkHoughTransform2DLinesImageFilter.h:34:
  warning: explicit link request to 'cos(Teta)' could not be resolved

Use a better LaTeX formula.

Change-Id: I39c6e98dabcbd5e4606a755114f67084ca942ecf
COMP: SigmoidTransferFunction members Alpha, Beta real type.

For:

  /scratch/dashboards/Linux-x86_64-gcc4.1/ITK/Modules/Numerics/NeuralNetworks/include/itkSigmoidTransferFunction.hxx:33:
  warning: converting to 'unsigned char' from 'double'

Change-Id: I8c965d785d7bac8474ff24c402a36efb1d103274
STYLE: Fix SigmoidTransformFunction template argument names.

Change-Id: I418d256612a86a65b6e3aaa86e92e470d4ba72ab
COMP: BuildHeaderTest.py print_function import.

Needs to be at the top of the file.

Change-Id: I33d23d9482c2c91f00cc2c284f952e7f99f49883
Merge topic 'headertest-print'

df2af6d6 COMP: BuildHeaderTest.py print_function import.
Merge topic 'houghlines-formula'

1e724e93 COMP: Use latex formula for HoughTransform doxygen.
Merge topic 'SpatialObjectDoc'

5bb373de DOC: Fix description of SpatialObject::GetBoundingBox()
Merge topic 'sigmoid-warning'

e5124114 STYLE: Fix SigmoidTransformFunction template argument names.
b69e7653 COMP: SigmoidTransferFunction members Alpha, Beta real type.