ENH: Bump CMakeLists.txt version to 4.8.1.
ENH: Bump CMakeLists.txt version to 4.8.1.

Change-Id: Ifc3b64d4ce9c98cb8b1932966b4c7eb131a54539

fbudin69500/ITK,zachary-williamson/ITK,spinicist/ITK,jcfr/ITK,LucasGandel/ITK,Kitware/ITK,Kitware/ITK,hjmjohnson/ITK,hjmjohnson/ITK,Kitware/ITK,fbudin69500/ITK,richardbeare/ITK,vfonov/ITK,stnava/ITK,zachary-williamson/ITK,vfonov/ITK,blowekamp/ITK,thewtex/ITK,zachary-williamson/ITK,PlutoniumHeart/ITK,PlutoniumHeart/ITK,hjmjohnson/ITK,BRAINSia/ITK,thewtex/ITK,zachary-williamson/ITK,richardbeare/ITK,jcfr/ITK,spinicist/ITK,thewtex/ITK,LucasGandel/ITK,InsightSoftwareConsortium/ITK,vfonov/ITK,blowekamp/ITK,LucasGandel/ITK,PlutoniumHeart/ITK,InsightSoftwareConsortium/ITK,richardbeare/ITK,biotrump/ITK,vfonov/ITK,BRAINSia/ITK,malaterre/ITK,Kitware/ITK,thewtex/ITK,blowekamp/ITK,malaterre/ITK,BRAINSia/ITK,vfonov/ITK,hjmjohnson/ITK,malaterre/ITK,biotrump/ITK,malaterre/ITK,biotrump/ITK,richardbeare/ITK,blowekamp/ITK,jcfr/ITK,InsightSoftwareConsortium/ITK,stnava/ITK,LucasGandel/ITK,malaterre/ITK,LucasGandel/ITK,InsightSoftwareConsortium/ITK,malaterre/ITK,vfonov/ITK,hjmjohnson/ITK,zachary-williamson/ITK,vfonov/ITK,fbudin69500/ITK,fbudin69500/ITK,blowekamp/ITK,vfonov/ITK,BRAINSia/ITK,thewtex/ITK,PlutoniumHeart/ITK,blowekamp/ITK,biotrump/ITK,richardbeare/ITK,stnava/ITK,zachary-williamson/ITK,fbudin69500/ITK,LucasGandel/ITK,fbudin69500/ITK,biotrump/ITK,BRAINSia/ITK,malaterre/ITK,zachary-williamson/ITK,spinicist/ITK,stnava/ITK,thewtex/ITK,LucasGandel/ITK,stnava/ITK,LucasGandel/ITK,richardbeare/ITK,InsightSoftwareConsortium/ITK,biotrump/ITK,PlutoniumHeart/ITK,hjmjohnson/ITK,zachary-williamson/ITK,spinicist/ITK,spinicist/ITK,malaterre/ITK,malaterre/ITK,biotrump/ITK,richardbeare/ITK,jcfr/ITK,PlutoniumHeart/ITK,BRAINSia/ITK,spinicist/ITK,jcfr/ITK,PlutoniumHeart/ITK,Kitware/ITK,InsightSoftwareConsortium/ITK,PlutoniumHeart/ITK,stnava/ITK,stnava/ITK,BRAINSia/ITK,Kitware/ITK,biotrump/ITK,InsightSoftwareConsortium/ITK,jcfr/ITK,blowekamp/ITK,stnava/ITK,spinicist/ITK,stnava/ITK,Kitware/ITK,blowekamp/ITK,zachary-williamson/ITK,jcfr/ITK,hjmjohnson/ITK,thewtex/ITK,spinicist/ITK,spinicist/ITK,vfonov/ITK,fbudin69500/ITK,fbudin69500/ITK,jcfr/ITK