fs from librestr
	modified:   CMakeLists.txt
	modified:   StiGame/CMakeLists.txt
	new file:   StiGame/files/Directory.cpp
	new file:   StiGame/files/Directory.h
	new file:   StiGame/files/Entry.cpp
	new file:   StiGame/files/Entry.h
	new file:   StiGame/files/File.cpp
	new file:   StiGame/files/File.h
	new file:   StiGame/files/FileSystem.cpp
	new file:   StiGame/files/FileSystem.h