"Allow unsafe" for all Windows 8 configurations
Some build configurations in the Windows 8 project were missing the "Allow unsafe" option.  This causes a build failure.
Update submodules to point to latest head
Samples and ThirdParty/Libs submodules required updating to latest.
Merge pull request #1189 from slygamer/win8-unsafe

"Allow unsafe" for all Windows 8 configurations
Merge pull request #1190 from slygamer/submodule-update

Update submodules to point to latest head