Add plutil for win32 & test files.
Adjust the implementation of save logic.
Add methods for add & remove lib files.
Add methods for add library search path & header search path.
Update the test project file.
Add methods for remove library search path & header search path.
Add script to modify the VS project & add test code, test project file.
Add script to modify the Android.mk & add test code, test file.
Update the tools scripts.