Update INSTALL file with information about Fink package manager
Update INSTALL file with information about Fink package manager

lgritz/oiio,mcanthony/oiio,lgritz/oiio,scott-wilson/oiio,scott-wilson/oiio,sambler/oiio,YangYangTL/oiio,bdeluca/oiio,lgritz/oiio,bdeluca/oiio,OpenImageIO/oiio,micler/oiio,micler/oiio,cwilling/oiio,mcanthony/oiio,sambler/oiio,cwilling/oiio,sambler/oiio,sambler/oiio,scott-wilson/oiio,YangYangTL/oiio,cwilling/oiio,OpenImageIO/oiio,mcanthony/oiio,scott-wilson/oiio,cwilling/oiio,micler/oiio,OpenImageIO/oiio,bdeluca/oiio,bdeluca/oiio,micler/oiio,lgritz/oiio,mcanthony/oiio,YangYangTL/oiio,OpenImageIO/oiio,YangYangTL/oiio