ENH: Introducing ImportImageFilter.

And added an itkImportVectorImageFilter to manage the case of the
VectorImage.

Still needs more work.
ENH: cleaned up types, more improvement to vector import
ENH: 126 - Fix MeasurementMap include bug

SIMPLEITK-126
Merge branch 'master' into SIMPLEITK-11-AddingFFTs
BUG: added tolerant baseline images for complex filters

These filters use tan or other floating point computation, this is not
exact between systems and tolerant baseline images are needed.
DOC: cleaned up some comments and documentation
ENH: automatically add compile flag -fPIC with SuperBuild
Merge topic 'SIMPLEITK-137-fPIC'

98346ee ENH: automatically add compile flag -fPIC with SuperBuild
5ded4de DOC: cleaned up some comments and documentation
Merge topic 'SIMPLEITK-126-MeasurementMapIncludeString-GH'

086cb31 ENH: 126 - Fix MeasurementMap include bug
Merge topic 'SIMPLEITK-11-AddingFFTs'

852bcc1 BUG: added tolerant baseline images for complex filters
ed3d6a1 Merge branch 'master' into SIMPLEITK-11-AddingFFTs
a4c7457 BUG: bool false type needs quotes
6236ec5 BUG: change filter to use composite filter
4552055 ENH: adding itk_name to JSON
343f657 BUG: FFTComplexToComplex is not correctly implemented in ITK
e97bc60 ENH: added example of FFTConvolution
18cd8f7 ENH: update the mandelbrot set test to reasonable performance
4f7d309 ENH: added test for various complex to real filters
86d6620 ENH: added tests for FFT and complex image filters
3af5a2f ENH: Adding support to Reader for complex numbers
1b02614 FIX: updated the FFT filters to work with the latest changes in ITK
30d4752 ENH: StatisticsIF was missing Sum computed attribute.
855602f WIP: fixing for latest FFT fix in ITK
3170954 ENH: adding filters to comvert to complex numbers
9516906 ENH: adding basic FFT filters
acafb62 ENH: adding mamdelbrot and complex numbers
ENH: update the ITK version

Recent changes to the ExtractImageFilter are needed for SimpleITK.
DOC: adding documentation about using gerrit
WIP: adding N4BiasFieldCorrection image filter
BUG: N4 correction needs float as input

For some reason it was causing a segfault when the input image to N4
was not real, this needs to be checked!
ENH: improved parameters for N4MRIBiadFieldCorrection

Change the parameters based on recommendation by Nick
Tustison. Changed the order to reflect most commonly set
paramters. Update example, and added test ( which still needs tolerant
baseline image ).
ENH: fix testing data, fix dual dispatch test

The tests for the dual-dispatch template assumed that all filters
supported uint8 and uint16 images. This is not always the case.

A new input image was added. We needed a floating point intensity
image and a integer mask image.
ENH: enable the N4 example as a tests

Fixed a varaible name bug in the example
ENH: adding basic distance image filters

This set of distance image filters has one input and one output.
Merge topic 'N4BMRIBiasFieldCorrection'

45de542 ENH: enable the N4 example as a tests
0cbe3f8 ENH: fix testing data, fix dual dispatch test
7c46a07 ENH: improved parameters for N4MRIBiadFieldCorrection
e66a5fe BUG: N4 correction needs float as input
9c47417 WIP: adding N4BiasFieldCorrection image filter
Merge branch 'master' into SIMPLEITK-142-AddSomeDistanceMapFilters

Conflicts:
	Testing/Data