Add metis-4.0/
Add `#ifndef _WIN32` to metis-4.0/Lib/metis.h
Remove Win32 configurations from Project/SuiteSparse.sln
Add metis-4.0/Windows/winrand.c
Add Project/METIS/METIS.vcxproj{,.filters}
Add metis-4.0/Lib include to Project/SuiteSparse_library_x64.props
Add METIS.lib dependences to Project/CHOLMOD_shared/CHOLMOD_shared.vcxproj and Project/CHOLMOD_L_shared/CHOLMOD_L_shared.vcxproj