DOC: Use more robust ITK-HDF5 upstream merge command
DOC: Use more robust ITK-HDF5 upstream merge command

Git's subtree merge strategy tries to guess the directory into which the
subtree history is to be merged.  Since many of the module directories
look the same it may guess wrong.  Instead use the recursive merge
strategy with the 'subtree=...' option to tell it where to put the tree.

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