removed errors and warning after converting it to c

Now code is getting compiled on linux, i am doing for windows.

In 608.h file I have moved deceleration of function below the definition of structure, since function need to the definition of structure which are passed in structure.

In ccextractor.h i have put the function inside extern "C" which were in c files.

renamed timing.cpp and encoding.cpp since they function were used by c files.