Added gradient filters
Added gradient filters

InsightSoftwareConsortium/ITK,CapeDrew/DITK,itkvideo/ITK,hendradarwin/ITK,hinerm/ITK,CapeDrew/DITK,zachary-williamson/ITK,blowekamp/ITK,BlueBrain/ITK,rhgong/itk-with-dom,GEHC-Surgery/ITK,BRAINSia/ITK,LucasGandel/ITK,malaterre/ITK,vfonov/ITK,vfonov/ITK,blowekamp/ITK,wkjeong/ITK,atsnyder/ITK,eile/ITK,malaterre/ITK,CapeDrew/DCMTK-ITK,jcfr/ITK,LucHermitte/ITK,hendradarwin/ITK,malaterre/ITK,biotrump/ITK,CapeDrew/DITK,zachary-williamson/ITK,GEHC-Surgery/ITK,LucasGandel/ITK,BRAINSia/ITK,ajjl/ITK,daviddoria/itkHoughTransform,InsightSoftwareConsortium/ITK,spinicist/ITK,jcfr/ITK,LucasGandel/ITK,paulnovo/ITK,hinerm/ITK,Kitware/ITK,fuentesdt/InsightToolkit-dev,PlutoniumHeart/ITK,rhgong/itk-with-dom,biotrump/ITK,hjmjohnson/ITK,malaterre/ITK,CapeDrew/DCMTK-ITK,fuentesdt/InsightToolkit-dev,jmerkow/ITK,jmerkow/ITK,LucasGandel/ITK,richardbeare/ITK,hjmjohnson/ITK,BlueBrain/ITK,malaterre/ITK,cpatrick/ITK-RemoteIO,malaterre/ITK,BRAINSia/ITK,atsnyder/ITK,hendradarwin/ITK,richardbeare/ITK,richardbeare/ITK,ajjl/ITK,fbudin69500/ITK,blowekamp/ITK,stnava/ITK,fuentesdt/InsightToolkit-dev,biotrump/ITK,hinerm/ITK,itkvideo/ITK,spinicist/ITK,cpatrick/ITK-RemoteIO,spinicist/ITK,fbudin69500/ITK,jcfr/ITK,thewtex/ITK,paulnovo/ITK,CapeDrew/DITK,hjmjohnson/ITK,fuentesdt/InsightToolkit-dev,vfonov/ITK,InsightSoftwareConsortium/ITK,fbudin69500/ITK,richardbeare/ITK,CapeDrew/DCMTK-ITK,stnava/ITK,heimdali/ITK,stnava/ITK,ajjl/ITK,thewtex/ITK,fedral/ITK,rhgong/itk-with-dom,vfonov/ITK,heimdali/ITK,daviddoria/itkHoughTransform,fuentesdt/InsightToolkit-dev,CapeDrew/DITK,fedral/ITK,biotrump/ITK,vfonov/ITK,atsnyder/ITK,daviddoria/itkHoughTransform,ajjl/ITK,daviddoria/itkHoughTransform,richardbeare/ITK,itkvideo/ITK,ajjl/ITK,fedral/ITK,PlutoniumHeart/ITK,InsightSoftwareConsortium/ITK,biotrump/ITK,CapeDrew/DCMTK-ITK,CapeDrew/DCMTK-ITK,BlueBrain/ITK,biotrump/ITK,Kitware/ITK,hinerm/ITK,fedral/ITK,spinicist/ITK,wkjeong/ITK,hendradarwin/ITK,zachary-williamson/ITK,hendradarwin/ITK,BRAINSia/ITK,jcfr/ITK,vfonov/ITK,blowekamp/ITK,cpatrick/ITK-RemoteIO,jmerkow/ITK,itkvideo/ITK,LucasGandel/ITK,hjmjohnson/ITK,spinicist/ITK,msmolens/ITK,PlutoniumHeart/ITK,hinerm/ITK,richardbeare/ITK,fbudin69500/ITK,BlueBrain/ITK,BlueBrain/ITK,cpatrick/ITK-RemoteIO,vfonov/ITK,vfonov/ITK,InsightSoftwareConsortium/ITK,wkjeong/ITK,itkvideo/ITK,hinerm/ITK,wkjeong/ITK,jmerkow/ITK,msmolens/ITK,eile/ITK,BlueBrain/ITK,GEHC-Surgery/ITK,PlutoniumHeart/ITK,LucHermitte/ITK,BlueBrain/ITK,fbudin69500/ITK,spinicist/ITK,stnava/ITK,malaterre/ITK,msmolens/ITK,zachary-williamson/ITK,rhgong/itk-with-dom,jcfr/ITK,BRAINSia/ITK,stnava/ITK,BlueBrain/ITK,CapeDrew/DITK,paulnovo/ITK,jcfr/ITK,malaterre/ITK,itkvideo/ITK,zachary-williamson/ITK,fuentesdt/InsightToolkit-dev,Kitware/ITK,eile/ITK,CapeDrew/DCMTK-ITK,msmolens/ITK,thewtex/ITK,CapeDrew/DCMTK-ITK,msmolens/ITK,InsightSoftwareConsortium/ITK,LucHermitte/ITK,blowekamp/ITK,daviddoria/itkHoughTransform,hinerm/ITK,zachary-williamson/ITK,hendradarwin/ITK,itkvideo/ITK,PlutoniumHeart/ITK,CapeDrew/DITK,rhgong/itk-with-dom,rhgong/itk-with-dom,atsnyder/ITK,CapeDrew/DITK,GEHC-Surgery/ITK,fuentesdt/InsightToolkit-dev,daviddoria/itkHoughTransform,LucHermitte/ITK,heimdali/ITK,zachary-williamson/ITK,thewtex/ITK,itkvideo/ITK,hjmjohnson/ITK,cpatrick/ITK-RemoteIO,thewtex/ITK,fbudin69500/ITK,eile/ITK,atsnyder/ITK,hinerm/ITK,wkjeong/ITK,CapeDrew/DCMTK-ITK,vfonov/ITK,ajjl/ITK,GEHC-Surgery/ITK,fedral/ITK,rhgong/itk-with-dom,richardbeare/ITK,blowekamp/ITK,fedral/ITK,atsnyder/ITK,Kitware/ITK,paulnovo/ITK,cpatrick/ITK-RemoteIO,fuentesdt/InsightToolkit-dev,paulnovo/ITK,malaterre/ITK,wkjeong/ITK,heimdali/ITK,GEHC-Surgery/ITK,stnava/ITK,itkvideo/ITK,hinerm/ITK,LucHermitte/ITK,blowekamp/ITK,GEHC-Surgery/ITK,biotrump/ITK,PlutoniumHeart/ITK,rhgong/itk-with-dom,jcfr/ITK,ajjl/ITK,heimdali/ITK,paulnovo/ITK,LucasGandel/ITK,stnava/ITK,Kitware/ITK,wkjeong/ITK,stnava/ITK,BRAINSia/ITK,InsightSoftwareConsortium/ITK,jmerkow/ITK,jmerkow/ITK,thewtex/ITK,eile/ITK,hendradarwin/ITK,jmerkow/ITK,eile/ITK,msmolens/ITK,LucHermitte/ITK,daviddoria/itkHoughTransform,Kitware/ITK,spinicist/ITK,atsnyder/ITK,eile/ITK,fuentesdt/InsightToolkit-dev,cpatrick/ITK-RemoteIO,spinicist/ITK,heimdali/ITK,paulnovo/ITK,zachary-williamson/ITK,zachary-williamson/ITK,LucasGandel/ITK,ajjl/ITK,LucHermitte/ITK,jmerkow/ITK,atsnyder/ITK,msmolens/ITK,LucasGandel/ITK,blowekamp/ITK,GEHC-Surgery/ITK,spinicist/ITK,fedral/ITK,wkjeong/ITK,LucHermitte/ITK,thewtex/ITK,heimdali/ITK,msmolens/ITK,jcfr/ITK,daviddoria/itkHoughTransform,biotrump/ITK,CapeDrew/DITK,PlutoniumHeart/ITK,BRAINSia/ITK,atsnyder/ITK,fbudin69500/ITK,heimdali/ITK,hjmjohnson/ITK,paulnovo/ITK,PlutoniumHeart/ITK,eile/ITK,hendradarwin/ITK,eile/ITK,fedral/ITK,stnava/ITK,daviddoria/itkHoughTransform,cpatrick/ITK-RemoteIO,fbudin69500/ITK,hjmjohnson/ITK,CapeDrew/DCMTK-ITK,Kitware/ITK