Checksyscalls improvements and calcgrade fix

1: Checksyscalls can take in folder arguments(with or without trailin$
2: Modified the regular expressions so that open now does not match f$
3: Added sycalls ioctl, close and readlink to the list.
4: Renintroduced the config.sh backtrace to home
5: fixed paths to rmcomments.sh to fix the original bug
#Hope that everything works now