Add -o,--output option to completely override MSI file name and destination

[volks73]

Following from #137, a -o,--output option to completely override the MSI file name, and not just the "name" component, would be useful and more aligned with convention. The current file naming scheme is <NAME>-<VERSION>-<ARCH>.msi or <NAME>-<VERSION>-<ARCH>-debug.msi. The -n,--name option only changes the <NAME> component, but an option to change to a completely different file name and/or destination could be useful.