Added NzInputStream

Added NzFile::Read(buffer, size)
NzFile::Read(nullptr, size) now acts as a skip function (ex: SetCursorPos(GetCursorPos() + size)

src/Nazara/Core/Thread.cpp

@@ -5,6 +5,7 @@
 // Inspiré du code de la SFML par Laurent Gomila
 
 #include <Nazara/Core/Thread.hpp>
+#include <Nazara/Core/Config.hpp>
 #include <Nazara/Core/Error.hpp>
 
 #if defined(NAZARA_PLATFORM_WINDOWS)