Add hash256 and hash160, update ApplicationEngine

[ShawnYun]

close #288
Link neo-project/neo#1655

[ProDog]

I have tested, it's all OK.

Contract:

        public static object Hash160Test(byte[] msg)
        {
            Runtime.Notify(Crypto.RIPEMD160(msg));
            Runtime.Notify(Crypto.HASH160(msg));
            return Crypto.HASH160(msg);
        }

        public static object Hash256Test(byte[] msg)
        {
            Runtime.Notify(Crypto.HASH256(msg));
            Runtime.Notify(Crypto.SHA256(msg));
            return Crypto.HASH256(msg);
        }

Invoke:

neo> invoke 0xa723a2d956ccae9d73c5ef03c300a08a0b6ed796 hash256Test [{"type":"Byte","value":""}]
Invoking script with: '0c0011c00c0b68617368323536546573740c1496d76e0b8aa000c303efc5739daecc56d9a223a741627d5b52'
VM State: HALT
Gas Consumed: 0.0858123
Result Stack: [{"type":"ByteString","value":"Xfbg4nYTWdMKgnUFjimfzAOBU0VF9Vz0PkGYP11MlFY="}]
Relay tx(no|yes): yes
Signed and relayed transaction with hash=0x4c669fa06bfbcae88b4425daae33b88ee9b6b5613d95e284340b4c08ccf44923
neo> invoke 0xa723a2d956ccae9d73c5ef03c300a08a0b6ed796 hash160Test [{"type":"Byte","value":""}]
Invoking script with: '0c0011c00c0b68617368313630546573740c1496d76e0b8aa000c303efc5739daecc56d9a223a741627d5b52'
VM State: HALT
Gas Consumed: 0.0858123
Result Stack: [{"type":"ByteString","value":"tHKiZtC9icE3BqQTLM\u002Bxb3w7n8s="}]
Relay tx(no|yes): yes
Signed and relayed transaction with hash=0x830d40a1f37c899c2d91cf26a52e5f4b61996491f5899eb3355fb5c72613cfd0

Notify:

"notifications": [
            {
                "contract": "0xa723a2d956ccae9d73c5ef03c300a08a0b6ed796",
                "state": {
                    "type": "Array",
                    "value": [
                        {
                            "type": "ByteString",
                            "value": "Xfbg4nYTWdMKgnUFjimfzAOBU0VF9Vz0PkGYP11MlFY="
                        }
                    ]
                }
            },
            {
                "contract": "0xa723a2d956ccae9d73c5ef03c300a08a0b6ed796",
                "state": {
                    "type": "Array",
                    "value": [
                        {
                            "type": "ByteString",
                            "value": "47DEQpj8HBSa+/TImW+5JCeuQeRkm5NMpJWZG3hSuFU="
                        }
                    ]
                }
            }
        ]

"notifications": [
            {
                "contract": "0xa723a2d956ccae9d73c5ef03c300a08a0b6ed796",
                "state": {
                    "type": "Array",
                    "value": [
                        {
                            "type": "ByteString",
                            "value": "nBGFpcXp/FRhKAiXfuj1SLIljTE="
                        }
                    ]
                }
            },
            {
                "contract": "0xa723a2d956ccae9d73c5ef03c300a08a0b6ed796",
                "state": {
                    "type": "Array",
                    "value": [
                        {
                            "type": "ByteString",
                            "value": "tHKiZtC9icE3BqQTLM+xb3w7n8s="
                        }
                    ]
                }
            }
        ]