More 64-bit changes

SystemInfo.pm:
- Use GlobalMemoryStatusEx instead of GlobalMemoryStatus.
- Update struct used by GetSystemInfo.
- Update comment about $proc_type.
test.pl
- Fix ProcessorInfo test (return value isn't numeric).
example.pl
- Add example.pl script.
Fix 32-bit issue

Revert over-zealous updates that broke MemoryStatus on 32-bit Perls.
Merge branch 'v012' of https://github.com/mrmuskrat/perl-win32-systeminfo into mrmuskrat-v012

Conflicts:
	test.pl