POL_Install_msvc100: use POL_Download_Resource
POL_Install_msvc100: remove spurious spaces
Backup upstream version of POL_Install_msvc80 function
POL_Install_msvc80: remove spurious spaces
POL_Install_msvc80: use POL_Download_Resource
Backup upstream version of POL_Install_msvc90 function
POL_Install_msvc90: remove spurious spaces
POL_Install_msvc90: use POL_Download_Resource
Backup upstream version of POL_Install_msxml4 function
POL_Install_msxml4: use POL_Download_Resource
Backup upstream version of POL_Install_origin function
POL_Install_origin: do not put setup into ressources

Unless its download is validated with a hash; Otherwise in case of
download problem, the only solution for the user is to go clean his
resources cache.