feat: add exchange issuance via ZeroEx

Co-authored-by: Christian Koopmann <[email protected]>

Author: ckoopmann

contracts/exchangeIssuance/ExchangeIssuanceZeroEx.sol

@@ -65,7 +65,7 @@ contract ExchangeIssuanceZeroEx is Ownable, ReentrancyGuard {
     );
 
     event ExchangeRedeem(
-        address indexed _recipient,     // The recipient address which redeemed the SetTokens
+        address indexed _recipient,     // The recipient adress of the output tokens obtained for redemption
         ISetToken indexed _setToken,    // The redeemed SetToken
         IERC20 indexed _outputToken,    // The address of output asset(ERC20/ETH) received by the recipient
         uint256 _amountSetRedeemed,     // The amount of SetTokens redeemed for output tokens