ENH: Name to NumPyConversion, document module, add FindNumPy.cmake.
STYLE: Fix spacing in itkPyBufferTest.
STYLE: Style improvements to itkPyBuffer.{h,hxx}.
BUG: Make the test pass.

More work needs to be done for the GetImageFromArray.
DOC: Fix Doxygen group test.
ENH: Rename to BridgeNumpy.

Consistent with OpenCV and VXL bridge module names.
BUG: Mark module EXCLUDE_FROM_DEFAULT.

Required since it requires the NumPy system includes and is a potential
Remote Module.