ENH: Set the LIBRARY_OUTPUT_PATH and EXECUTABLE_OUTPUT_PATH variables only if they havent already been set. This allows a parent project to set these directories and then subdir into ITK, so as to have all the libraries built into one common place, usually the one of the parent project. STYLE: Add some comments
ENH: Set the LIBRARY_OUTPUT_PATH and EXECUTABLE_OUTPUT_PATH variables only if
they havent already been set. This allows a parent project to set these directories
and then subdir into ITK, so as to have all the libraries built into one common
place, usually the one of the parent project.
STYLE: Add some comments

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