rename dodo member system

contracts/DODOMemberSystem/impl/MemPermission.sol

@@ -0,0 +1,27 @@
+/*
+
+    Copyright 2020 DODO ZOO.
+    SPDX-License-Identifier: Apache-2.0
+
+*/
+
+pragma solidity 0.6.9;
+pragma experimental ABIEncoderV2;
+
+import {Ownable} from "../../lib/Ownable.sol";
+import {IPermissionManager} from "../../lib/PermissionManager.sol";
+import {IMemSource} from "./MemSourceStake.sol";
+
+contract MemPermission is Ownable {
+    uint256 public _MEM_LEVEL_THRESHOLD_;
+    address public _MEM_LEVEL_SOURCE_;
+
+    constructor(address memLevelSource, uint256 memLevelThreshold) public {
+        _MEM_LEVEL_THRESHOLD_ = memLevelThreshold;
+        _MEM_LEVEL_SOURCE_ = memLevelSource;
+    }
+
+    function isAllowed(address account) external returns (bool) {
+        return IMemSource(_MEM_LEVEL_SOURCE_).getMemLevel(account) >= _MEM_LEVEL_THRESHOLD_;
+    }
+}