add note of the code reading
add create resource set with cpu and memory reserv

Compilable.
But the even the existing create-cpu-reservation.c in util/ does not
work!
The system call to create a resource set is always returning -1, even
when I set the RK_ERROR as -100 from -1.
It seems that the system call never succeed or called. It is probably
caused by the inconsistent of the system call table?