Merge pull request #38 from BendDAO/develop

1.Optimize Liquidation Mechanism;
2.Split LendPool to libraries;
3.Split LendPoolConfigurator to libraries;
4.Optimize NFT Oracle;

Author: thorseldon

abis/BendProtocolDataProvider.json

@@ -281,49 +281,61 @@
     "name": "getNftConfigurationData",
     "outputs": [
       {
-        "internalType": "uint256",
-        "name": "ltv",
-        "type": "uint256"
-      },
-      {
-        "internalType": "uint256",
-        "name": "liquidationThreshold",
-        "type": "uint256"
-      },
-      {
-        "internalType": "uint256",
-        "name": "liquidationBonus",
-        "type": "uint256"
-      },
-      {
-        "internalType": "uint256",
-        "name": "redeemDuration",
-        "type": "uint256"
-      },
-      {
-        "internalType": "uint256",
-        "name": "auctionDuration",
-        "type": "uint256"
-      },
-      {
-        "internalType": "uint256",
-        "name": "redeemFine",
-        "type": "uint256"
-      },
-      {
-        "internalType": "uint256",
-        "name": "redeemThreshold",
-        "type": "uint256"
-      },
-      {
-        "internalType": "bool",
-        "name": "isActive",
-        "type": "bool"
-      },
-      {
-        "internalType": "bool",
-        "name": "isFrozen",
-        "type": "bool"
+        "components": [
+          {
+            "internalType": "uint256",
+            "name": "ltv",
+            "type": "uint256"
+          },
+          {
+            "internalType": "uint256",
+            "name": "liquidationThreshold",
+            "type": "uint256"
+          },
+          {
+            "internalType": "uint256",
+            "name": "liquidationBonus",
+            "type": "uint256"
+          },
+          {
+            "internalType": "uint256",
+            "name": "redeemDuration",
+            "type": "uint256"
+          },
+          {
+            "internalType": "uint256",
+            "name": "auctionDuration",
+            "type": "uint256"
+          },
+          {
+            "internalType": "uint256",
+            "name": "redeemFine",
+            "type": "uint256"
+          },
+          {
+            "internalType": "uint256",
+            "name": "redeemThreshold",
+            "type": "uint256"
+          },
+          {
+            "internalType": "uint256",
+            "name": "minBidFine",
+            "type": "uint256"
+          },
+          {
+            "internalType": "bool",
+            "name": "isActive",
+            "type": "bool"
+          },
+          {
+            "internalType": "bool",
+            "name": "isFrozen",
+            "type": "bool"
+          }
+        ],
+        "internalType": "struct BendProtocolDataProvider.NftConfigurationData",
+        "name": "configData",
+        "type": "tuple"
       }
     ],
     "stateMutability": "view",

abis/LendPoolAddressesProvider.json

@@ -125,19 +125,6 @@
     "name": "LendPoolConfiguratorUpdated",
     "type": "event"
   },
-  {
-    "anonymous": false,
-    "inputs": [
-      {
-        "indexed": true,
-        "internalType": "address",
-        "name": "newAddress",
-        "type": "address"
-      }
-    ],
-    "name": "LendPoolLiquidatorUpdated",
-    "type": "event"
-  },
   {
     "anonymous": false,
     "inputs": [
@@ -395,19 +382,6 @@
     "stateMutability": "view",
     "type": "function"
   },
-  {
-    "inputs": [],
-    "name": "getLendPoolLiquidator",
-    "outputs": [
-      {
-        "internalType": "address",
-        "name": "",
-        "type": "address"
-      }
-    ],
-    "stateMutability": "view",
-    "type": "function"
-  },
   {
     "inputs": [],
     "name": "getLendPoolLoan",
@@ -648,19 +622,6 @@
     "stateMutability": "nonpayable",
     "type": "function"
   },
-  {
-    "inputs": [
-      {
-        "internalType": "address",
-        "name": "liquidator",
-        "type": "address"
-      }
-    ],
-    "name": "setLendPoolLiquidator",
-    "outputs": [],
-    "stateMutability": "nonpayable",
-    "type": "function"
-  },
   {
     "inputs": [
       {