modify build.sh (#77)
modify build.sh (#77)

* now user can specify --fe, --be and --clean
cyongli/palo,morningman/palo,lingbin/palo,imay/palo,cyongli/palo,cyongli/palo,imay/palo,imay/palo,imay/palo,lingbin/palo,imay/palo,morningman/palo,cyongli/palo,lingbin/palo,morningman/palo,imay/palo,lingbin/palo,lingbin/palo,cyongli/palo,morningman/palo,lingbin/palo,morningman/palo,morningman/palo,cyongli/palo