Implement base58 Python module checksum
>>> import base58
>>> moul_pubkey = "GfKERHnJTYzKhKUma5h1uWhetbA8yHKymhVH2raf2aCP"
>>> moul_pubkey_checksum = base58.b58encode_check(moul_pubkey)
>>> moul_pubkey_checksum
b'3cuhfZK54A9QKvtGTsTEvaX81Xta6dPdjHFuhS2mWCcbCdFHsT91hKStGQqtBy7Lgr'
>>> base58.b58decode_check(moul_pubkey_checksum)
b'GfKERHnJTYzKhKUma5h1uWhetbA8yHKymhVH2raf2aCP'
>>> base58.b58decode(moul_pubkey_checksum)
b'GfKERHnJTYzKhKUma5h1uWhetbA8yHKymhVH2raf2aCP{h\xbb#'
Should be implemented into DuniterPy.