New File System and Cleanup some code Part 3

* Remove stdafx.h and some <unordered_set> includes
* Update Minecraft Server Defines and remove more unused folders/files
* Unbloat stdafx.h from Minecraft.World

Minecraft.World/File.cpp

@@ -1,14 +1,7 @@
-#include "stdafx.h"
 #include "FileFilter.h"
 #include "McRegionLevelStorageSource.h"
 #include "File.h"
-
-#ifdef __PS3__
-#include <cell/cell_fs.h>
-#endif
-#ifdef __PSVITA__
-#include <fios2.h>
-#endif
+#include "StringHelpers.h"
 
 const wchar_t File::pathSeparator = L'\\';
 #ifdef _XBOX