Organize integrations folder into integration type. (#70)

Author: bweick

contracts/protocol/integration/BalancerV1ExchangeAdapter.sol renamed to contracts/protocol/integration/exchange/BalancerV1ExchangeAdapter.sol

@@ -28,8 +28,8 @@ pragma experimental "ABIEncoderV2";
 
 import { ERC20 } from "@openzeppelin/contracts/token/ERC20/ERC20.sol";
 import { SafeMath } from "@openzeppelin/contracts/math/SafeMath.sol";
-import { PreciseUnitMath } from "../../lib/PreciseUnitMath.sol";
-import { IKyberNetworkProxy } from "../../interfaces/external/IKyberNetworkProxy.sol";
+import { PreciseUnitMath } from "../../../lib/PreciseUnitMath.sol";
+import { IKyberNetworkProxy } from "../../../interfaces/external/IKyberNetworkProxy.sol";
 
 contract KyberExchangeAdapter {
     using SafeMath for uint256;

contracts/protocol/integration/KyberExchangeAdapter.sol renamed to contracts/protocol/integration/exchange/KyberExchangeAdapter.sol

@@ -19,8 +19,8 @@
 pragma solidity 0.6.10;
 pragma experimental "ABIEncoderV2";
 
-import { ISynth } from "../../interfaces/external/ISynth.sol";
-import { ISynthetixExchanger } from "../../interfaces/external/ISynthetixExchanger.sol";
+import { ISynth } from "../../../interfaces/external/ISynth.sol";
+import { ISynthetixExchanger } from "../../../interfaces/external/ISynthetixExchanger.sol";
 
 /**
  * @title SynthetixTradeAdapter