ENH: Make IO factory registration manager optional for applications
ENH: Make IO factory registration manager optional for applications

Since commit 7adc806b (Configure built-in IO Factories Registration,
2011-03-15) the UseITK module has generated a header into the
application build tree, added an include directory for it, and defined
ITK_IO_FACTORY_REGISTER_MANAGER for the whole directory.  While this
achieves automatic registration of IO support for all available formats
in the application, not all applications need this magic.  Some may
prefer to register support only for the formats they need.

Conditionalize the behavior on "NOT ITK_NO_IO_FACTORY_REGISTER_MANAGER"
so that applications may disable it by setting the variable before
loading ITK.

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