Added usage print and exit if no options are given
Added usage print and exit if no options are given

jvehent/cipherscan,MikeDawg/cipherscan,MikeDawg/cipherscan,PeterMosmans/cipherscan,jvehent/cipherscan,MikeDawg/cipherscan,jvehent/cipherscan,PeterMosmans/cipherscan,PeterMosmans/cipherscan