Fixed: nib2cib "The built in image NSRadioButton is not supported" error.
Fixed: nib2cib "The built in image NSRadioButton is not supported" error.

The nib2cib change which introduced support for the plus and minus template images in nib2cib also broke support for converting radio groups.

This fix restores that support.

mrcarlberg/cappuccino,kidaa/cappuccino,FrankReh/cappuccino,Rosch/cappuccino,deltaprojects/cappuccino,Rosch/cappuccino,Rosch/cappuccino,deltaprojects/cappuccino,tancred/cappuccino,cappuccino/cappuccino,cappuccino/cappuccino,rgv151/cappuccino,krodelin/cappuccino,FrankReh/cappuccino,krodelin/cappuccino,deltaprojects/cappuccino,cacaodev/cappuccino,mrcarlberg/cappuccino,cappuccino/cappuccino,FrankReh/cappuccino,primalmotion/cappuccino,koamac/Cappuccino,koamac/Cappuccino,enquora/cappuccino,mrcarlberg/cappuccino,krodelin/cappuccino,kidaa/cappuccino,daboe01/cappuccino,FrankReh/cappuccino,Dogild/cappuccino,cappuccino/cappuccino,krodelin/cappuccino,enquora/cappuccino,AlexanderMazaletskiy/cappuccino,tancred/cappuccino,tancred/cappuccino,Rosch/cappuccino,primalmotion/cappuccino,daboe01/cappuccino,deltaprojects/cappuccino,AlexanderMazaletskiy/cappuccino,krodelin/cappuccino,cappuccino/cappuccino,zittix/cappuccino,Dogild/cappuccino,zittix/cappuccino,mrcarlberg/cappuccino,koamac/Cappuccino,enquora/cappuccino,enquora/cappuccino,FrankReh/cappuccino,tancred/cappuccino,mrcarlberg/cappuccino,cappuccino/cappuccino,mrcarlberg/cappuccino,enquora/cappuccino,AlexanderMazaletskiy/cappuccino,mrcarlberg/cappuccino,Dogild/cappuccino,Dogild/cappuccino,Rosch/cappuccino,cacaodev/cappuccino,tancred/cappuccino,FrankReh/cappuccino,primalmotion/cappuccino,wangshijin/cappuccino,kidaa/cappuccino,FrankReh/cappuccino,zittix/cappuccino,krodelin/cappuccino,primalmotion/cappuccino,rgv151/cappuccino,zittix/cappuccino,AlexanderMazaletskiy/cappuccino,rgv151/cappuccino,zittix/cappuccino,primalmotion/cappuccino,rgv151/cappuccino,deltaprojects/cappuccino,rgv151/cappuccino,Dogild/cappuccino,primalmotion/cappuccino,zittix/cappuccino,rgv151/cappuccino,daboe01/cappuccino,FrankReh/cappuccino,cappuccino/cappuccino,zittix/cappuccino,wangshijin/cappuccino,AlexanderMazaletskiy/cappuccino,enquora/cappuccino,wangshijin/cappuccino,primalmotion/cappuccino,kidaa/cappuccino,wangshijin/cappuccino,cacaodev/cappuccino,kidaa/cappuccino,tancred/cappuccino,wangshijin/cappuccino,daboe01/cappuccino,koamac/Cappuccino,mrcarlberg/cappuccino,cacaodev/cappuccino,cacaodev/cappuccino,kidaa/cappuccino,AlexanderMazaletskiy/cappuccino,cacaodev/cappuccino,Dogild/cappuccino,Dogild/cappuccino,daboe01/cappuccino,cacaodev/cappuccino,koamac/Cappuccino,deltaprojects/cappuccino,daboe01/cappuccino,Rosch/cappuccino,enquora/cappuccino,Rosch/cappuccino,krodelin/cappuccino,daboe01/cappuccino,deltaprojects/cappuccino,koamac/Cappuccino,wangshijin/cappuccino,rgv151/cappuccino