ENH: MergeAdjacentImages and others with registration to use TubeTK/Reg
BUG: Fixed use of simple averaging
ITK fft filter

Conflicts:

	Applications/ImageEditor/ImageEditor.cxx
	Applications/ImageEditor/QtImageEditor.cxx
	Applications/ImageEditor/QtImageEditor.h
Gaussian derivative implemented

Conflicts:

	Applications/ImageEditor/ImageEditor.cxx
	Applications/ImageEditor/QtImageEditor.cxx
	Applications/ImageEditor/QtImageEditor.h
Amend to merge commit
Move GaussianDerivativeImageSource to TubeTK/Base/Numerics
ImageViewer's bug fixed GaussianDerivativeImageSource uses template
FFTGaussianDerivativeIFFTFilter improvement
Add order vector in GUI
itktubeFFTGaussianDerivativeIFFTFilter available
BUG: Params from EvoOpt weren't set correctly for GradOpt
ENH: Improved registration and option for fast blending (experimental)
BUG: Missing path to Slicer coded downloaded during build.

Slicer/Libs/ITKFatoryRegistration is built and used by SEMCLI.  Path to
.h files were missing.
Merge pull request #284 from aylward/Merge

Merge
ENH: Bump ImageViewer to compile on MacOS
Merge pull request #285 from aylward/ImageViewerUpdate

ENH: Bump ImageViewer to compile on MacOS
ENH: Bump version of ImageViewer to use same version of JSon
Merge pull request #286 from aylward/BumpImageViewerForJSon

ENH: Bump version of ImageViewer to use same version of JSon
Merge pull request #287 from chrysteljuan/add-order-vector-in-gui

Add order vector in gui