only use FindExInfoBasic on win7+
Merge pull request #780 from nico/versioncheck

only use FindExInfoBasic on win7+
simplify statcache code more
Merge pull request #781 from nico/cleaner

simplify statcache code more
suppress warning on win8.1 sdk
Merge pull request #782 from sgraham/warning-on-81sdk

suppress warning on win8.1 sdk