fix fee rate, max fee, etc. (#156)

defs/coins/fujicoin.json

@@ -8,14 +8,14 @@
   "curve_name": "secp256k1",
   "address_type": 36,
   "address_type_p2sh": 16,
-  "maxfee_kb": 1000000,
+  "maxfee_kb": 10000000,
   "minfee_kb": 100000,
   "signed_message_header": "FujiCoin Signed Message:\n",
   "hash_genesis_block": "adb6d9cfd74075e7f91608add4bd2a2ea636f70856183086842667a1597714a0",
   "xpub_magic": 76067358,
   "xprv_magic": 76066276,
   "xpub_magic_segwit_p2sh": 77429938,
-  "xpub_magic_segwit_native": null,
+  "xpub_magic_segwit_native": 78792518,
   "bech32_prefix": "fc",
   "cashaddr_prefix": null,
   "slip44": 75,
@@ -26,12 +26,12 @@
   "bip115": false,
   "version_group_id": null,
   "default_fee_b": {
-    "Low": 100000,
-    "Economy": 200000,
-    "Normal": 500000,
-    "High": 1000000
+    "Low": 100,
+    "Economy": 200,
+    "Normal": 500,
+    "High": 1000
   },
-  "dust_limit": 100000,
+  "dust_limit": 546,
   "blocktime_seconds": 60,
   "address_prefix": "fujicoin:",
   "min_address_length": 27,