Added Gincoin support (#253)

defs/bitcoin/gincoin.json

@@ -0,0 +1,40 @@
+{
+  "coin_name": "Gincoin",
+  "coin_shortcut": "GIN",
+  "coin_label": "GIN",
+  "website": "https://gincoin.io",
+  "github": "https://github.com/gincoin-dev/gincoin-core",
+  "maintainer": "Dragos Badea <dragos.badea@gincoin.io>",
+  "curve_name": "secp256k1",
+  "address_type": 38,
+  "address_type_p2sh": 10,
+  "maxfee_kb": 100000,
+  "minfee_kb": 1000,
+  "signed_message_header": "DarkCoin Signed Message:\n",
+  "hash_genesis_block": "00000cd6bde619b2c3b23ad2e384328a450a37fa28731debf748c3b17f91f97d",
+  "xprv_magic": 50221816,
+  "xpub_magic": 50221772,
+  "xpub_magic_segwit_p2sh": null,
+  "xpub_magic_segwit_native": null,
+  "bech32_prefix": null,
+  "cashaddr_prefix": null,
+  "slip44": 5,
+  "segwit": false,
+  "decred": false,
+  "fork_id": null,
+  "force_bip143": false,
+  "bip115": false,
+  "default_fee_b": {
+    "Normal": 10
+  },
+  "dust_limit": 5460,
+  "blocktime_seconds": 120,
+  "uri_prefix": "gincoin",
+  "min_address_length": 27,
+  "max_address_length": 34,
+  "bitcore": [],
+  "blockbook": [
+    "https://blockbook.gincoin.io"
+  ],
+  "cooldown": 100
+}