abi diff

usage:
    ctc abi diff FIRST_ADDRESS SECOND_ADDRESS [options]

description:
    display diff of two contract ABI's

example:
    ctc abi diff 0x5f4ec3df9cbd43714fe2740f5e3616155c5b8419 0xf79d6afbb6da890132f9d7c355e3015f15f3406f

arguments:
    FIRST_ADDRESS     first contract address
    SECOND_ADDRESS    second contract address
    --functions       show functions only
    --events          show events only