ENH: ExternalData: Optionally hash files and create content links
ENH: ExternalData: Optionally hash files and create content links

Add option ExternalData_LINK_CONTENT to enable conversion of real data
files referenced by the DATA{} syntax into content links.

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