Add truffle-plugin-verify for etherscan verification

.gitignore

@@ -4,6 +4,7 @@ build-legacy
 tmp
 bin
 .outputParameter
+flatten
 
 ## Core latex/pdflatex auxiliary files:
 *.aux

migrations/2_deploy_contracts.js

@@ -0,0 +1,17 @@
+/* globals artifacts */
+
+const ApprovedTransfer = artifacts.require("ApprovedTransfer");
+const GuardianStorage = artifacts.require("GuardianStorage");
+
+module.exports = (deployer, network) => {
+  console.log(`## ${network} network ##`);
+  deployer.deploy(
+    ApprovedTransfer,
+    "0x22Ce12a6dFCF7d67c3DbEF01B19707077b528223",
+    "0x3bD35C298Ea89EfA0EF2dB208aB562E9e3F89DF4",
+    "0x0479B49a95c6bF395F1fC7d0118b44c752C7c410",
+    "0x0A1545B32D7cdea1EeD2fb259A82AcFE5e75962C",
+    "0xc778417E063141139Fce010982780140Aa0cD5Ab");
+
+  deployer.deploy(GuardianStorage);
+};