ENH: added 2 tests for PNG.
ENH: added 2 tests for PNG.

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