更新主分支版本： build 473 rev 9 。

--HG--
branch : master
rename : YFramework/include/YSLib/Service/yfile.h => YFramework/include/YSLib/Service/File.h
rename : YFramework/include/YSLib/Core/yfilesys.h => YFramework/include/YSLib/Service/FileSystem.h
rename : YFramework/include/YSLib/Service/yftext.h => YFramework/include/YSLib/Service/TextFile.h
rename : YFramework/source/YSLib/Service/yfile.cpp => YFramework/source/YSLib/Service/File.cpp
rename : YFramework/source/YSLib/Core/yfilesys.cpp => YFramework/source/YSLib/Service/FileSystem.cpp
rename : YFramework/source/YSLib/Service/yftext.cpp => YFramework/source/YSLib/Service/TextFile.cpp