Fix: remove platform specific clean
Fix: compile subtask failed
Include stdarg.h at require.cpp
Fix: compile error on Visual Studio
Fix: pre.generate.app fired twice
Fix: path.sep should be used to replace relative file name
Merge pull request #4 from infosia/platform_clean

Fix: platform specific clean
Merge pull request #5 from infosia/stdarg_h

Merged. Include stdarg.h at require.cpp